Stellar weak decay rates in neutron-deficient medium-mass nuclei

被引：32

作者：

Sarriguren, P. ^{[1
]}

机构：

[1] CSIC, Inst Estruct Mat, E-28006 Madrid, Spain

来源：

PHYSICAL REVIEW C | 2011年 / 83卷 / 02期

关键词：

GROUND-STATE PROPERTIES; PROTON-RICH NUCLEI; SD-SHELL NUCLEI; TO-Z NUCLEI; BETA-DECAY; RP-PROCESS; SHAPE-COEXISTENCE; HALF-LIVES; SELF-CONSISTENT; RATE TABLES;

D O I：

10.1103/PhysRevC.83.025801

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Weak decay rates under stellar density and temperature conditions holding at the rapid proton-capture process are studied in neutron-deficient medium-mass waiting-point nuclei extending from Ni up to Sn. Neighboring isotopes to these waiting-point nuclei are also included in the analysis. The nuclear structure part of the problem is described within a deformed Skyrme Hartree-Fock + BCS + quasiparticle random-phase-approximation approach, which reproduces not only the beta-decay half-lives but also the available Gamow-Teller strength distributions, measured under terrestrial conditions. The various sensitivities of the decay rates to both density and temperature are discussed. In particular, we study the impact of contributions coming from thermally populated excited states in the parent nucleus and the competition between beta decays and continuum electron captures.

引用

页数：17

共 91 条

[1]

ANDREOIU C, 2007, PHYS REV C 041301, V75

[2] Coulomb displacement energies between analog levels for 3<=A<=239 [J].

Antony, MS ;

Pape, A ;

Britz, J .

ATOMIC DATA AND NUCLEAR DATA TABLES, 1997, 66 (01) :1-63

[3] Nuclear structure aspects in nuclear astrophysics [J].

Aprahamian, A ;

Langanke, K ;

Wiescher, M .

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL. 54, NO 2, 2004, 54 (02) :535-613

[4] The NUBASE evaluation of nuclear and decay properties [J].

Audi, G ;

Bersillon, O ;

Blachot, J ;

Wapstra, AH .

NUCLEAR PHYSICS A, 2003, 729 (01) :3-128

[5] Production and β Decay of r p-Process Nuclei 96Cd, 98In, and 100Sn [J].

Bazin, D. ;

Montes, F. ;

Becerril, A. ;

Lorusso, G. ;

Amthor, A. ;

Baumann, T. ;

Crawford, H. ;

Estrade, A. ;

Gade, A. ;

Ginter, T. ;

Guess, C. J. ;

Hausmann, M. ;

Hitt, G. W. ;

Mantica, P. ;

Matos, M. ;

Meharchand, R. ;

Minamisono, K. ;

Perdikakis, G. ;

Pereira, J. ;

Pinter, J. ;

Portillo, M. ;

Schatz, H. ;

Smith, K. ;

Stoker, J. ;

Stolz, A. ;

Zegers, R. G. T. .

PHYSICAL REVIEW LETTERS, 2008, 101 (25)

[6] Investigation of prolate-oblate shape-coexistence in 74Kr [J].

Becker, F ;

Korten, W ;

Hannachi, F ;

Paris, P ;

Buforn, N ;

Chandler, C ;

Houry, M ;

Hübel, H ;

Jansen, A ;

Le Coz, Y ;

Liang, CF ;

Lopez-Martens, A ;

Lucas, R ;

Mergel, E ;

Regan, PH ;

Schönwasser, G ;

Theisen, C .

EUROPEAN PHYSICAL JOURNAL A, 1999, 4 (02) :103-105

[7] Shape coexistence in neutron-deficient Kr isotopes: Constraints on the single-particle spectrum of self-consistent mean-field models from collective excitations [J].

Bender, M. ;

Bonche, P. ;

Heenen, P. -H. .

PHYSICAL REVIEW C, 2006, 74 (02)

[8]

BOHR A, 1975, NUCL STRUCT

[9] SELF-CONSISTENT STUDY OF TRIAXIAL DEFORMATIONS - APPLICATION TO THE ISOTOPES OF KR, SR, ZR AND MO [J].

BONCHE, P ;

FLOCARD, H ;

HEENEN, PH ;

KRIEGER, SJ ;

WEISS, MS .

NUCLEAR PHYSICS A, 1985, 443 (01) :39-63

[10] Beta-decay rates [J].

Borzov, I. N. .

NUCLEAR PHYSICS A, 2006, 777 :645-675

← 1 2 3 4 5 6 7 8 9 10 →