Effective interactions for the 0p1s0dnuclear shell-model space

Warburton, E.K.; Brown, B. A.

doi:10.1103/physrevc.46.923

Cited by 642 publications

(838 citation statements)

References 66 publications

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“…We obtain f = 995.224(68) yielding an f t-value of 803.04 +0.26 −0.23 s, where we added the statistical and systematic errors in quadrature. In order to take into account the shape correction we performed shell-model calculations using the Cohen-Kurath interaction [54] and with the Warburton-Brown interaction, denoted PWBT in [55], adjusted to either reproduce the experimental Gamow-Teller matrix element or the weak magnetism term, which in Holstein's notation [56] is b = 68.4 (7), determined from the width of the 0 + → 1 + transition in 6 Li [57]. Both adjustments result in almost identical terms for the statistical rate function and we obtain f ⋆ = 997.12 (58).…”

Section: Resultsmentioning

confidence: 99%

Precision measurement of the6He half-life and the weak axial current in nuclei

et al. 2012

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Background: The beta decays of 3 H and 6 He can play an important role in testing nuclear wave-function calculations and fixing low-energy constants in effective-field theory approaches. However, there exists a large discrepancy between previous measurements of the 6 He half-life.Purpose: Our measurement aims at resolving this long-standing discrepancy in the 6 He half-life and providing a reliable f t-value and Gamow-Teller matrix element for comparison with theoretical ab-initio calculations.Method: We measured the 6 He half-life by counting the beta-decay electrons with two scintillator detectors operating in coincidence.Results: The measured 6 He half-life is 806.89 ± 0.11stat +0.23 −0.19 syst ms corresponding to a relative precision of 3 × 10 −4 . Calculating the statistical rate function we determined the f t-value to be 803.04 +0.26 −0.23 s. Conclusions: Our result resolves the previous discrepancy by providing a higher-precision result with careful analysis of potential systematic uncertainties. The result provides a reliable basis for future precision comparisons with ab-inito calculations.

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Section: Resultsmentioning

confidence: 99%

Precision measurement of the6He half-life and the weak axial current in nuclei

et al. 2012

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“…These were performed using the code OXBASH [28]. The calculations used the WBP effective interaction [29], and a model space truncated to allow 0hω and 1hω excitations relative to the p-sd ground Table 1. Total reaction cross section of σ tra was calculated by using zero-range distorted wave born approximation code DWUCK4 [30].…”

Section: -1 One Neutron Removal Reactionsmentioning

confidence: 99%

One- and two-neutron removal reactions from19,20C with a proton target

Ozawa¹,

Hashizume²,

Aoki³

et al. 2011

Phys. Rev. C

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One and two-neutron removal-reactions from 19 C and 20 C have been studied using a liquid-hydrogen target at 40 A MeV. A small cross section has been observed in the one-neutron removal reaction from 20 C. The observed inclusive removal cross sections are compared with theoretical removal cross sections calculated by using shell model spectroscopic factors and Glauber-model single-particle cross-sections. The observed momentum distributions are also compared with those calculated by using continuum-discretized coupled-channel methods. Good consistency between theory and experiment is shown in the one-neutron removal reaction from 19 C. However, our theoretical calculation fails to reproduce the neutron removal reactions from 20 C, which suggests that further improvements of the theoretical descriptions are necessary.

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“…The M = 0 (J = 0) dimension for 16 O is 1.8 × 10 7 (6.3 × 10 5 ), which enables one to carry out a full p-sd calculation with recent large-scale shell-model codes. As for the effective interaction, we start with the p-sd part of the WBT interaction (PSDWBT) [5]. This choice of the Hamiltonian is rather similar to the calculation of WBM [4].…”

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confidence: 99%

“…We return to the region around 16 O to see whether the multiparticle-multihole states around 16 [5]. To fit the seven quantities exactly, seven parameters are required.…”

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confidence: 99%