LMU/musrfit
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Merged in constants (pull request #12)

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update the physical constants pertaining to the muon

Approved-by: Andreas Suter
This commit is contained in:
Ryan M. L. McFadden 2022-01-11 10:41:59 +00:00 committed by Andreas Suter
commit 3cc36bcb6d
1 changed files with 14 additions and 7 deletions
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21
src/include/PMusr.h
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@ -61,14 +61,21 @@
#define PRUN_ASYMMETRY_BNMR 5 #define PRUN_ASYMMETRY_BNMR 5
#define PRUN_NON_MUSR 8 #define PRUN_NON_MUSR 8
// muon life time in (us), see PRL99, 032001 (2007) // muon lifetime in (us) - see e.g.:
#define PMUON_LIFETIME 2.197019 // P. A. Zyla et al. (Particle Data Group), Prog. Theor. Exp. Phys. 2020, 083C01 (2020).
// https://doi.org/10.1093/ptep/ptaa104
// https://pdg.lbl.gov/2021/
#define PMUON_LIFETIME 2.1969811
// muon gyromagnetic ratio, see gamma_mu = 2.0 mu_mu / hbar // muon gyromagnetic ratio: gamma_mu = 2.0 * mu_mu / hbar - see e.g.:
// mu_mu = -4.49044807(15) 1e-26 J/T (see http://physics.nist.gov/cgi-bin/cuu/Results?search_for=muon) // E. Tiesinga et al., Rev. Mod. Phys. 93, 025010 (2021).
// hbar = 1.054571726(47) 1e-34 Js (see http://physics.nist.gov/cgi-bin/cuu/Value?hbar|search_for=universal_in!) // https://doi.org/10.1103/RevModPhys.93.025010
// gamma_muon / (2 pi) = 1.355342e-2 (MHz/G) // https://physics.nist.gov/cuu/Constants/index.html
#define GAMMA_BAR_MUON 1.35538817e-2 // mu_mu = -4.490 448 30(10) * 1e-26 J/T
// hbar = 1.054 571 817... * 1e-34 J*s
// gamma_muon / (2 pi) = 135.538 809 4(30) MHz/T
// = 0.013 553 880 94(30) MHz/G
#define GAMMA_BAR_MUON 1.355388094e-2
// accelerator cycles in (us), needed to determine proper background // accelerator cycles in (us), needed to determine proper background
#define ACCEL_PERIOD_PSI 0.01975 #define ACCEL_PERIOD_PSI 0.01975