pynucastro.rates package

pynucastro.rates package#

The core routines needed to read and interpret nuclear reaction rates

pynucastro.rates.load_rate(rfile=None)[source]#

Try to load a rate of any type.

Raises:: RateFileError, UnsupportedNucleus

Submodules#

pynucastro.rates.alternate_rates module#

class pynucastro.rates.alternate_rates.DeBoerC12agO16[source]#: Bases: ReacLibRate

pynucastro.rates.approximate_rates module#

class pynucastro.rates.approximate_rates.ApproximateRate(primary_rate, secondary_rates, primary_reverse, secondary_reverse, *, is_reverse=False, approx_type='ap_pg', use_identical_particle_factor=True)[source]#

Bases: Rate

eval(T, *, rho=None, comp=None)[source]#: evaluate the approximate rate

function_string_cxx(dtype='double', specifiers='inline', leave_open=False, extra_args=())[source]#: Return a string containing C++ function that computes the approximate rate

function_string_py()[source]#: Return a string containing python function that computes the approximate rate

get_child_rates()[source]#: return a list of all of the rates that are used in this approximation

pynucastro.rates.approximate_rates.create_double_neutron_capture(lib, reactant, product)[source]#: a helper function that will return an ApproximateRate object for the “nn_g” approximation

pynucastro.rates.derived_rate module#

class pynucastro.rates.derived_rate.DerivedRate(rate, compute_Q=False, use_pf=False)[source]#

Bases: ReacLibRate

This class is a derived class from Rate with the purpose of computing the inverse rate by the application of detailed balance to the forward reactions.

counter_factors()[source]#: This function returns the nucr! = nucr_1! * … * nucr_r! for each repeated nucr reactant and nucp! = nucp_1! * … * nucp_p! for each reactant nucp product in a ordered pair (nucr!, nucp!). The factors nucr! and nucp! avoid overcounting when more than one nuclei is involve in the reaction, otherwise it will return 1.0.

eval(T, *, rho=None, comp=None)[source]#: evauate the reaction rate for temperature T

function_string_cxx(dtype='double', specifiers='inline', leave_open=False, extra_args=())[source]#: Return a string containing C++ function that computes the rate

function_string_py()[source]#: Return a string containing python function that computes the rate

pynucastro.rates.files module#

Functions for dealing with the rate data directories.

exception pynucastro.rates.files.RateFileError[source]#

Bases: Exception

An error occurred while trying to read a Rate from a file.

pynucastro.rates.files.get_rates_dir()[source]#

pynucastro.rates.files.get_tabular_dir()[source]#

pynucastro.rates.known_duplicates module#

pynucastro.rates.known_duplicates.find_duplicate_rates(rate_list)[source]#: given a list of rates, return a list of groups of duplicate rates

pynucastro.rates.known_duplicates.is_allowed_dupe(rate_list)[source]#: rate_list is a list of rates that provide the same connection in a network. Return True if this is an allowed duplicate

pynucastro.rates.library module#

class pynucastro.rates.library.LangankeLibrary[source]#

Bases: TabularLibrary

Load all of the tabular rates inside /library/tabular/langanke/ and return a Library.

lib_path = PosixPath('/opt/hostedtoolcache/Python/3.11.11/x64/lib/python3.11/site-packages/pynucastro/library/tabular/langanke')#

class pynucastro.rates.library.Library(libfile=None, rates=None)[source]#

Bases: object

A Library is a Rate container that reads a single file containing one or many Reaclib rates, possibly containing multiple sets per rate.

The Library class also implements searching based on rules specified by RateFilter objects.

add_rate(rate)[source]#: Manually add a rate by giving a Rate object

add_rates(ratelist)[source]#: Add to the rate dictionary from the supplied list of Rate objects.

backward()[source]#: Select only the reverse rates, obtained by detailed balance.

derived_backward(compute_Q=False, use_pf=False)[source]#: This library contains the detailed balance reverse reactions over the selected .derived_forward(), computed by hand.

derived_forward()[source]#

In this library, we exclude the weak and tabular rates from the .forward() library which includes all the ReacLib forward reactions.

In a future PR, we will classify forward reactions as exothermic (Q>0), and reverse by endothermic (Q<0). However, ReacLib does not follow this path. If a reaction is measured experimentally (independent of Q), they use detailed balance to get the opposite direction. Eventually, I want to classify forward and reverse by positive Q and negative Q; however, for testing purposes, making this classification may eventually lead to computing the detailed balance twice.

The idea of derived_forward is to eliminate the reverse and weak, and see if our job gives the same Reaclib predictions, checking the NSE convergence with the pf functions. In the future, I want to move this function in a unit test.

filter(filter_spec)[source]#: filter_specs should be an iterable of RateFilter objects or a single RateFilter object. Library.filter yields all rates matching any RateFilter in filter_specs. If RateFilter.exact, then return rates with exactly the reactants or products passed in as arguments.

find_duplicate_links()[source]#

report on an rates where another rate exists that has the same reactants and products. These may not be the same Rate object (e.g., one could be tabular the other a simple decay), but they will present themselves in the network as the same link.

We return a list, where each entry is a list of all the rates that share the same link

forward()[source]#: Select only the forward rates, discarding the inverse rates obtained by detailed balance.

get_nuclei()[source]#: get the list of unique nuclei

get_rate(rid)[source]#: Return a rate matching the id provided.

get_rate_by_name(name)[source]#: Given a string representing a rate in the form ‘A(x,y)B’ (or a list of strings for multiple rates) return the Rate objects that match from the Library. If there are multiple inputs, then a list of Rate objects is returned.

get_rate_by_nuclei(reactants, products)[source]#: given a list of reactants and products, return any matching rates

get_rates()[source]#: Return a list of the rates in this library.

heaviest()[source]#: Return the heaviest nuclide in this library.

lightest()[source]#: Return the lightest nuclide in this library.

linking_nuclei(nuclist, with_reverse=True, print_warning=True)[source]#

Return a Library object containing the rates linking the nuclei provided in the list of Nucleus objects or nucleus abbreviations ‘nuclist’.

If with_reverse is True, then include reverse rates. Otherwise include only forward rates.

If print_warning is True, then print out a warning if one of the input nuclei is not linked.

property num_rates#

remove_rate(rate)[source]#: Manually remove a rate from the library by supplying the short name “A(x,y)B, a Rate object, or the rate id

write_to_file(filename, prepend_rates_dir=False)[source]#: Write the library out to a file of the given name in Reaclib format. Will be automatically written to the pynucastro rate file directory if True is passed in as the second argument.

class pynucastro.rates.library.RateFilter(reactants=None, products=None, exact=True, reverse=None, min_reactants=None, max_reactants=None, min_products=None, max_products=None, filter_function=None)[source]#

Bases: object

RateFilter filters out a specified rate or set of rates A RateFilter stores selection rules specifying a rate or group of rates to assist in searching for rates stored in a Library.

invert()[source]#: Return a RateFilter matching the inverse rate.

matches(r)[source]#: Given a Rate r, see if it matches this RateFilter.

class pynucastro.rates.library.ReacLibLibrary[source]#

Bases: Library

Load the latest stored version of the ReacLib library and return a Library

class pynucastro.rates.library.SuzukiLibrary[source]#

Bases: TabularLibrary

Load all of the tabular rates inside /library/tabular/suzuki/ and return a Library.

lib_path = PosixPath('/opt/hostedtoolcache/Python/3.11.11/x64/lib/python3.11/site-packages/pynucastro/library/tabular/suzuki')#

class pynucastro.rates.library.TabularLibrary[source]#

Bases: Library

Load all of the tabular rates known and return a Library

lib_path = PosixPath('/opt/hostedtoolcache/Python/3.11.11/x64/lib/python3.11/site-packages/pynucastro/library/tabular')#

pynucastro.rates.library.capitalize_rid(rid, delimiter)[source]#

pynucastro.rates.library.list_known_rates()[source]#: list the rates found in the library

pynucastro.rates.rate module#

Classes and methods to interface with files storing rate data.

class pynucastro.rates.rate.Rate(reactants=None, products=None, Q=None, weak_type='', label='generic', use_identical_particle_factor=True)[source]#

Bases: object

The base reaction rate class. Most rate types will subclass this and extend to their particular format.

cname()[source]#: a C++-safe version of the rate name

eval(T, *, rho=None, comp=None)[source]#

eval_jacobian_term(T, rho, comp, y_i)[source]#

Evaluate drate/d(y_i), y_i is a Nucleus object. This rate term has the full composition and density dependence, i.e.:

rate = rho**n Y1**a Y2**b … N_A <sigma v>

The derivative is only non-zero if this term depends on nucleus y_i.

get_rate_id()[source]#: Get an identifying string for this rate.

heaviest()[source]#

Return the heaviest nuclide in this Rate.

If two nuclei are tied in mass number, return the one with the lowest atomic number.

property id#

jacobian_string_py(y_i)[source]#

Return a string containing the term in a jacobian matrix in a reaction network corresponding to this rate differentiated with respect to y_i

y_i is an object of the class Nucleus.

lightest()[source]#

Return the lightest nuclide in this Rate.

If two nuclei are tied in mass number, return the one with the highest atomic number.

modify_products(new_products)[source]#: change the products of the rate to new_products. This will recompute the Q value and update the print respresentation.

swap_protons()[source]#: Change any protons in the rate to NSE protons. These act the same as protons but will be kept as distinct in the network.

ydot_string_py()[source]#: Return a string containing the term in a dY/dt equation in a reaction network corresponding to this rate.

class pynucastro.rates.rate.RatePair(forward=None, reverse=None)[source]#

Bases: object

the forward and reverse rates for a single reaction sequence. Forward rates are those with Q >= 0.

Variables:

forward – the forward reaction Rate object
reverse – the reverse reaction Rate object

class pynucastro.rates.rate.RateSource[source]#

Bases: object

A class that stores the reference label information for various rates.

csv_path = PosixPath('/opt/hostedtoolcache/Python/3.11.11/x64/lib/python3.11/site-packages/pynucastro/library/rate_sources.csv')#

labels = {'6an9cybt': {'Author': 'Cyburt, R.H.', 'Label': '6an9CYBT', 'Publisher': '-', 'Title': 'evaluation of He6(a,n)Be9 data', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=6an9CYBT', 'Year': '2010'}, 'ac12': {'Author': 'Arnold, C.W.', 'Label': 'ac12', 'Publisher': 'PRC 85,4', 'Title': 'Cross Section Measurement of 9Be(γ,n)8Be and Implications for α+α+n -> 9Be in the r-Process', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=ac12', 'Year': '2012'}, 'an06': {'Author': 'S. Ando', 'Label': 'an06', 'Publisher': 'PRC 74, 025809', 'Title': 'Radiative neutron capture on a proton at big-bang nucleosynthesis energies', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=an06', 'Year': '2006'}, 'ba00': {'Author': 'D.W. Bardayan et al.', 'Label': 'ba00', 'Publisher': 'PRC 62, 055804', 'Title': 'The astrophysically important 3+ state in Ne18 and the F17(p,γ)Ne18 stellar rate', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=ba00', 'Year': '2000'}, 'baka': {'Author': 'Z Y Bao', 'Label': 'baka', 'Publisher': 'ADNDT 36, 411', 'Title': 'Neutron Capture Cross Sections for s-Process Studies', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=baka', 'Year': '1987'}, 'bb92': {'Author': 'T Rauscher', 'Label': 'bb92', 'Publisher': 'ApJ 429, 499', 'Title': 'Production of heavy elements in inhomogeneous cosmologies', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=bb92', 'Year': '1994'}, 'be13': {'Author': 'A. Best et al.', 'Label': 'be13', 'Publisher': 'PHYSICAL REVIEW C 87, 045805 (2013)', 'Title': 'Measurement of the reaction 17O(?,n)20Ne and its impact on the s process in massive stars', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=be13', 'Year': '2013'}, 'bec': {'Author': '-', 'Label': 'bec', 'Publisher': '-', 'Title': 'experimental electron-capture rates', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=bec', 'Year': '0'}, 'bet+': {'Author': '-', 'Label': 'bet+', 'Publisher': '-', 'Title': 'experimental beta-plus rates', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=bet+', 'Year': '-'}, 'bet-': {'Author': '-', 'Label': 'bet-', 'Publisher': '-', 'Title': 'experimental beta-minus rates', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=bet-', 'Year': '0'}, 'bex+': {'Author': '-', 'Label': 'bex+', 'Publisher': '-', 'Title': '-', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=bex+', 'Year': '-'}, 'bg11': {'Author': 'Best, A.', 'Label': 'bg11', 'Publisher': 'PRC 83, 052802(R)', 'Title': 'First direct measurement of resonance strengths in 17O(α,γ)21Ne', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=bg11', 'Year': '2011'}, 'bh06': {'Author': 'Bardayan, D.W. et al', 'Label': 'bh06', 'Publisher': 'PRC 74, 045804', 'Title': 'Astrophysically important 26Si states studied with the 28Si( p, t)26Si reaction. II. Spin of the', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=bh06', 'Year': '2006'}, 'bhi+': {'Author': 'M. Hirsch', 'Label': 'bhi+', 'Publisher': 'Data Nucl. Data Tables 53 165', 'Title': 'theoretical beta decay rates', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=bhi+', 'Year': '1995'}, 'bk91': {'Author': 'C.R. Brune', 'Label': 'bk91', 'Publisher': 'PRC 43, 875', 'Title': 'Cross sections for H3(Li7,n0)Be9 and H3(Li7,ntot)', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=bk91', 'Year': '1991'}, 'bk92': {'Author': 'C.R. Brune', 'Label': 'bk92', 'Publisher': 'PRC 45, 1382', 'Title': 'Total cross sections and thermonuclear reaction rates for C13(d,n) and C14(d,n)', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=bk92', 'Year': '1992'}, 'bkmo': {'Author': 'H V Klapdor', 'Label': 'bkmo', 'Publisher': 'ADNDT 31, 81', 'Title': 'Beta-Decay Half-Lives of Neutron-Rich Nuclei', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=bkmo', 'Year': '1984'}, 'bqa+': {'Author': 'P. Moller', 'Label': 'bqa+', 'Publisher': 'At. Data Nucl. Data Tables 66', 'Title': 'theoretical beta decay rates', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=bqa+', 'Year': '1997'}, 'br10': {'Author': 'Burda, O et al.', 'Label': 'br10', 'Publisher': 'PRC 82, 015808', 'Title': 'Resonance parameters of the first 1/2+ state in 9Be and astrophysical implications', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=br10', 'Year': '2010'}, 'bs99': {'Author': 'Bradfield-Smith, W', 'Label': 'BS99', 'Publisher': 'PhRvC 59, 6, p3402', 'Title': 'Breakout from the hot CNO cycle via the 18Ne(α,p)21Na reaction', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=BS99', 'Year': '1999'}, 'btyk': {'Author': 'K Takahashi', 'Label': 'btyk', 'Publisher': 'ADNDT 12, 101', 'Title': 'Beta-Decay Half-Lives Calculated on the Gross Theory', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=btyk', 'Year': '1973'}, 'bu96': {'Author': 'L. Buchmann', 'Label': 'bu96', 'Publisher': 'ApJL 468, 127', 'Title': 'New Stellar Reaction Rate for 12C(α,γ)16O', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=bu96', 'Year': '1996'}, 'cb01': {'Author': 'Caggiano, J.A.', 'Label': 'cb01', 'Publisher': 'PRC 64, 025802', 'Title': 'Spectroscopy of 23Al and 27P using the (7Li,8He', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=cb01', 'Year': '2001'}, 'cb09': {'Author': 'Chipps, K.A.', 'Label': 'cb09', 'Publisher': 'PRC 80, 065810', 'Title': 'The 17F(p,γ)18Ne resonant cross section', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=cb09', 'Year': '2009'}, 'cd08': {'Author': 'Cyburt, R.H.', 'Label': 'cd08', 'Publisher': 'PRC 78, 064614', 'Title': 'Evaluation of modern He3(a,g)Be7 data', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=cd08', 'Year': '2008'}, 'cd09': {'Author': '-', 'Label': 'cd09', 'Publisher': '-', 'Title': '-', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=cd09', 'Year': '0'}, 'cf88': {'Author': 'G R Caughlan', 'Label': 'cf88', 'Publisher': 'ADNDT 40, 283', 'Title': 'Thermonuclear Reaction Rates V', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=cf88', 'Year': '1988'}, 'ch09': {'Author': 'K. Y. Chae', 'Label': 'ch09', 'Publisher': 'PRC 79, 055804', 'Title': 'Constraint on the astrophysical 18Ne(α, p)21Na reaction rate through a 24Mg( p,t)22Mg measurement', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=ch09', 'Year': '2009'}, 'chw0': {'Author': 'Cyburt, R. H.', 'Label': 'chw0', 'Publisher': 'REACLIB', 'Title': 'Re-evaluation of Buchmann 1996 C12(a,g) and Hoffman Ca40(a,g) and Ti44(a,p) rates', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=chw0', 'Year': '2012'}, 'cn18': {'Author': 'D. Connolly et al.', 'Label': 'cn18', 'Publisher': 'Phys. Rev. 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Cyburt', 'Label': 'cybtCO', 'Publisher': '-', 'Title': 'CO burning re-evaluation based on experimental papers cited in cf88', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=cybtCO', 'Year': '2007'}, 'da04': {'Author': "D'Auria", 'Label': 'da04', 'Publisher': 'PRC 69, 065803', 'Title': 'The Na21(p,γ)Mg22 reaction from Ec.m.=200 to 1103 keV in novae and x-ray bursts', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=da04', 'Year': '2004'}, 'da18': {'Author': "G. D'Agata et al.", 'Label': 'da18', 'Publisher': 'APJ 860 (2018) 11', 'Title': 'The 19F(?, p)22Ne Reaction at Energies of Astrophysical Relevance by Means of the Trojan Horse Method and Its Implications in AGB Stars', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=da18', 'Year': '2018'}, 'db18': {'Author': 'L. 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Nomoto', 'Label': 'suzuki', 'Publisher': 'The Astrophysical Journal, Volume 817, Number 2', 'Title': 'Electron Capture and β-Decay Rates for sd-Shell Nuclei in Stellar Environments Relevant to High-Density O-NE-MG Cores', 'URL': 'https://doi.org/10.3847/0004-637X/817/2/163', 'Year': '2016'}, 'sw12': {'Author': 'Vermote, S.', 'Label': 'sw12', 'Publisher': 'PRC85,015803', 'Title': 'Experimental determination of the 41Ca(n,α)38Ar reaction cross section up to 80 keV, and calculation of the Maxwellian averaged cross section at stellar temperatures', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=sw12', 'Year': '2012'}, 'ta04': {'Author': 'X. Tang et al', 'Label': 'ta04', 'Publisher': 'PRC 69, 055807', 'Title': 'Determination of the direct capture contribution for N13(p,γ)O14 from the O14 -> N13+p asympto', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=ta04', 'Year': '2004'}, 'ta18': {'Author': 'R. 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Rauscher as part of REACLIB V1.0 release', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=ths8', 'Year': '2010'}, 'ths8g': {'Author': 'Cyburt, R. H. et al.', 'Label': 'ths8g', 'Publisher': 'ApJS (189) 240', 'Title': 'Theory rates from T. Rauscher as part of REACLIB V1.0 release', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=ths8g', 'Year': '2010'}, 'to11': {'Author': 'Togano, Y. et al', 'Label': 'to11', 'Publisher': 'PRC 84, 035808', 'Title': 'Resonance states in 27P using Coulomb dissociation and their effect on the stellar reaction 26Si(p,g)27P', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=to11', 'Year': '2011'}, 'trc8': {'Author': 'Cyburt, R.H. et al.', 'Label': 'trc8', 'Publisher': 'ApJS (189) 240', 'Title': 'REFIT: Theory rates from T. Rauscher as part of REACLIB V1.0 release', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=trc8', 'Year': '2014'}, 'tu19': {'Author': 'E.M. 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A, 1000 (2020) 121884', 'Title': 'Comparative study of the direct ?+d ? 6Li + ? astrophysical capture reaction in few-body models', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=tu19', 'Year': '2020'}, 'ua08': {'Author': 'Ugalde, C.', 'Label': 'ua08', 'Publisher': 'PRC 77, 035801', 'Title': 'Thermonuclear rate for the 19F(α,p)22Ne reaction at stellar temperatures', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=ua08', 'Year': '2008'}, 'ur98': {'Author': 'Utku, S', 'Label': 'ur98', 'Publisher': 'PhRvC 57, 5, p2731', 'Title': 'Breakout from the hot CNO cycle: The 18F(p,γ) vs 18F(p,α) branching ratio', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=ur98', 'Year': '1998'}, 'vb94': {'Author': 'Vouzoukas, S.', 'Label': 'vb94', 'Publisher': 'PRC 50, 1185', 'Title': 'Reaction rate for S31(p,γ)Cl32 and its influence on the SiP cycle in hot stellar hydrogen burning', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=vb94', 'Year': '1994'}, 'wa19': {'Author': 'A. 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Tuli', 'Label': 'wc12', 'Publisher': 'National Nuclear Data Center', 'Title': 'Weak rates from the Nuclear Wallet Cards', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=wc12', 'Year': '2012'}, 'wc17': {'Author': '-', 'Label': 'wc17', 'Publisher': 'National Nuclear Data Center', 'Title': 'Weak rates from the Nuclear Wallet Cards', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=wc17', 'Year': '2017'}, 'wd09': {'Author': 'Wrede, C.', 'Label': 'wd09', 'Publisher': 'PHYSICAL REVIEW C 79, 035803', 'Title': 'Thermonuclear 25Al( p, γ )26Si reaction rate in classical novae and Galactic 26Al', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=wd09', 'Year': '2009'}, 'wfh': {'Author': 'R V Wagoner', 'Label': 'wfh', 'Publisher': 'ApJ 148, 3', 'Title': 'On the Synthesis of Elements at Very High Temperatures', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=wfh', 'Year': '1967'}, 'wh87': {'Author': 'M.Wiescher', 'Label': 'wh87', 'Publisher': 'ApJ 316, 162-171', 'Title': 'Alpha-burning of O14', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=wh87', 'Year': '1987'}, 'wi2p': {'Author': 'Schatz', 'Label': 'wi2p', 'Publisher': 'Physics Rep. 294 167', 'Title': '2p capture reaction', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=wi2p', 'Year': '1998'}, 'wien': {'Author': 'Forstner', 'Label': 'wien', 'Publisher': 'Physics Review C 64 045801', 'Title': 'Thermonuclear reaction rate of Ni56(p,γ)Cu57 and Cu57(p,γ)Zn58', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=wien', 'Year': '2001'}, 'wien2': {'Author': '-', 'Label': 'wien2', 'Publisher': 'Physics Review C 64 045801', 'Title': 'Thermonuclear reaction rate of Ni56(p,γ)Cu57 and Cu57(p,γ)Zn58', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=wien2', 'Year': '2001'}, 'wies': {'Author': 'michael wiescher', 'Label': 'wies', 'Publisher': '-', 'Title': 'various', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=wies', 'Year': '2000'}, 'wr09': {'Author': 'Wrede, C.', 'Label': 'wr09', 'Publisher': 'PHYSICAL REVIEW C 79, 045808', 'Title': 'Thermonuclear 30S( p, γ )31Cl reaction in type I x-ray bursts', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=wr09', 'Year': '2009'}, 'ww02': {'Author': 'S. Wilmes, V. Wilmes, G. Staudt, P. Mohr', 'Label': 'ww02', 'Publisher': 'PRC 66, 065802', 'Title': 'The N15(a,γ)F19 reaction and nucleosynthesis of F19', 'URL': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=ww02', 'Year': '2002'}}#

classmethod source(label: str) → dict[str, str] | None[source]#: Returns the source of a rate given its label, and None if not found.

urls = {'debo': 'https://doi.org/10.1103/RevModPhys.89.035007', 'langanke': 'https://doi.org/10.1006/adnd.2001.0865', 'reaclib': 'https://reaclib.jinaweb.org/labels.php?action=viewLabel&label=', 'suzuki': 'https://doi.org/10.3847/0004-637X/817/2/163'}#

class pynucastro.rates.rate.Tfactors(*args, **kwargs)[source]#

Bases: Tfactors

precompute temperature factors for speed

Parameters:

T (float) – input temperature (Kelvin)

Variables:

T9 – T / 1.e9 K
T9i – 1.0 / T9
T913i – 1.0 / T9 ** (1/3)
T913 – T9 ** (1/3)
T953 – T9 ** (5/3)
lnT9 – log(T9)

class_type = jitclass.Tfactors#7f40ec992b90<T9:float64,T9i:float64,T913:float64,T913i:float64,T953:float64,lnT9:float64>#

pynucastro.rates.reaclib_rate module#

class pynucastro.rates.reaclib_rate.ReacLibRate(rfile=None, chapter=None, original_source=None, reactants=None, products=None, sets=None, labelprops=None, Q=None)[source]#

Bases: Rate

A single reaction rate. Currently, this is a ReacLib rate, which can be composed of multiple sets, or a tabulated electron capture rate.

Raises:: RateFileError, UnsupportedNucleus

eval(T, *, rho=None, comp=None)[source]#: evauate the reaction rate for temperature T

eval_deriv(T, *, rho=None, comp=None)[source]#: evauate the derivative of reaction rate with respect to T

function_string_cxx(dtype='double', specifiers='inline', leave_open=False, extra_args=())[source]#: Return a string containing C++ function that computes the rate

function_string_py()[source]#: Return a string containing python function that computes the rate

get_rate_exponent(T0)[source]#: for a rate written as a power law, r = r_0 (T/T0)**nu, return nu corresponding to T0

get_rate_id()[source]#: Get an identifying string for this rate. Don’t include resonance state since we combine resonant and non-resonant versions of reactions.

plot(Tmin=100000000.0, Tmax=1600000000.0, rhoYmin=390000000.0, rhoYmax=2000000000.0, figsize=(10, 10))[source]#

plot the rate’s temperature sensitivity vs temperature

Parameters:

Tmin (float) – minimum temperature for plot
Tmax (float) – maximum temperature for plot
rhoYmin (float) – minimum electron density to plot (e-capture rates only)
rhoYmax (float) – maximum electron density to plot (e-capture rates only)
figsize (tuple) – figure size specification for matplotlib

Returns:

a matplotlib figure object

Return type:

matplotlib.figure.Figure

write_to_file(f)[source]#: Given a file object, write rate data to the file.

class pynucastro.rates.reaclib_rate.SingleSet(a, labelprops)[source]#

Bases: object

a set in Reaclib is one piece of a rate, in the form

lambda = exp[ a_0 + sum_{i=1}^5 a_i T_9**(2i-5)/3 + a_6 log T_9]

A single rate in Reaclib can be composed of multiple sets

Parameters:

a – the coefficients of the exponential fit
labelprops – a collection of flags that classify a ReacLib rate

dfdT()[source]#: return a function for this dratedT(tf), where tf is a Tfactors object

dln_set_string_dT9_cxx(prefix='dset_dT', plus_equal=False)[source]#: return a string containing the C++ code for d/dT9 ln(set)

f()[source]#: return a function for rate(tf) where tf is a Tfactors object

set_string_cxx(prefix='set', plus_equal=False, with_exp=True)[source]#: return a string containing the C++ code for this set

set_string_py(prefix='set', plus_equal=False)[source]#: return a string containing the python code for this set

pynucastro.rates.tabular_rate module#

class pynucastro.rates.tabular_rate.TableIndex(value, names=None, *, module=None, qualname=None, type=None, start=1, boundary=None)[source]#

Bases: Enum

a simple enum-like container for indexing the electron-capture tables

DQ = 3#

GAMMA = 7#

MU = 2#

NU = 6#

RATE = 5#

RHOY = 0#

T = 1#

VS = 4#

class pynucastro.rates.tabular_rate.TableInterpolator(*args, **kwargs)[source]#

Bases: TableInterpolator

A simple class that holds a pointer to the table data and methods that allow us to interpolate a variable

class_type = jitclass.TableInterpolator#7f40eb9da350<data:array(float64, 2d, A),table_rhoy_lines:int32,table_temp_lines:int32,rhoy:array(float64, 1d, A),temp:array(float64, 1d, A)>#

class pynucastro.rates.tabular_rate.TabularRate(rfile=None)[source]#

Bases: Rate

A tabular rate.

Raises:: RateFileError, UnsupportedNucleus

eval(T, *, rho=None, comp=None)[source]#: evauate the reaction rate for temperature T

function_string_py()[source]#: Return a string containing python function that computes the rate

get_nu_loss(T, *, rho=None, comp=None)[source]#: get the neutrino loss rate for the reaction if tabulated

get_rate_id()[source]#: Get an identifying string for this rate. Don’t include resonance state since we combine resonant and non-resonant versions of reactions.

get_tabular_rate()[source]#: read the rate data from .dat file

plot(*, Tmin=None, Tmax=None, rhoYmin=None, rhoYmax=None, color_field='rate', figsize=(10, 10))[source]#

plot the rate’s temperature sensitivity vs temperature

Parameters:

Tmin (float) – minimum temperature for plot
Tmax (float) – maximum temperature for plot
rhoYmin (float) – minimum electron density to plot (e-capture rates only)
rhoYmax (float) – maximum electron density to plot (e-capture rates only)
figsize (tuple) – figure size specification for matplotlib

Returns:

a matplotlib figure object

Return type:

matplotlib.figure.Figure

pynucastro.rates package

Contents

pynucastro.rates package#

Submodules#

pynucastro.rates.alternate_rates module#

pynucastro.rates.approximate_rates module#

pynucastro.rates.derived_rate module#

pynucastro.rates.files module#

pynucastro.rates.known_duplicates module#

pynucastro.rates.library module#

pynucastro.rates.rate module#

pynucastro.rates.reaclib_rate module#

pynucastro.rates.tabular_rate module#