High-spin states, yrast isomers and residual interactions in the odd-odd nucleus 212At

被引：18

作者：

Bayer, S ^{[1
]}

Byrne, AP

Dracoulis, GD

Baxter, AM

Kibédi, T

Kondev, FG

Mullins, SM

McGoram, TR

机构：

[1] Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Phys Nucl, Canberra, ACT 0200, Australia

[2] Australian Natl Univ, The Faculties, Dept Phys & Theoret Phys, Canberra, ACT 0200, Australia

来源：

NUCLEAR PHYSICS A | 1999年 / 650卷 / 01期

关键词：

Pb-208(Li-7,3n)At-212; E = 32-44 MeV; measured gamma gamma(t); X gamma(t); E gamma; I-ce(t); At-212 deduced levels; J(pi); tau(m); reduced transition probabilities; enriched targets; pulsed beam; Compton suppressed Ge detectors; superconducting solenoidal electron spectrometer; Si(Li) detector; At-212; B(lambda); semi-empirical shell model calculations; yrast configurations; core-excitation; residual interactions; blocking; enhanced transitions; octupole coupling;

D O I：

10.1016/S0375-9474(99)00103-7

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：

Excited states in the odd-odd nucleus At-212 have been studied using gamma-ray and electron spectroscopy following the Pb-208(Li-7,3n) reaction. Levels were identified to spins of 25h and to excitation energies of about 4.8 MeV. New isomeric states which decay by enhanced E3 transitions have been established at spins 18(+), 22(-) and 25(-). Shell model calculations reproduce well the main features of the level scheme and show the configuration dependence of certain empirical residual interaction matrix elements. (C) 1999 Published by Elsevier Science B.V.

引用

页码：3 / 36

页数：34

共 32 条

[1] Calculation of the shell model energies for states in a variety of configurations in Bi-208 [J].

Alexa, P ;

Kvasil, J ;

Sheline, RK .

PHYSICAL REVIEW C, 1997, 55 (06) :3170-3173

[2] Calculation of shell model energies for states in Bi-210 [J].

Alexa, P ;

Kvasil, J ;

Minh, NV ;

Sheline, RK .

PHYSICAL REVIEW C, 1997, 55 (01) :179-186

[3]

ARTNACOHEN A, 1992, NUCL DATA SHEETS, V66, P172

[4] LIFETIMES OF THE 21(-)/2-STATE AND 29(+)/2-STATE IN AT-211 AND THEIR IMPLICATION FOR EFFECTIVE CHARGES AND QUADRUPOLE-MOMENTS [J].

BAYER, S ;

BYRNE, AP ;

DRACOULIS, GD .

NUCLEAR PHYSICS A, 1995, 591 (01) :104-116

[5]

BAYER S, 1998, THESIS AUSTR NATL U

[6] SYSTEMATICS OF B(E3) VALUES IN THE TRANS-LEAD REGION [J].

BERGSTROM, I ;

FANT, B .

PHYSICA SCRIPTA, 1985, 31 (01) :26-30

[7]

Browne E., 1992, Nuclear Data Sheets, V65, P209, DOI 10.1016/0090-3752(92)80007-7

[8]

Brussard P., 1977, Shell-Model Applications in Nuclear Spectroscopy

[9] Blocking of octupole correlations deduced from the decay of a multiparticle isomer in 212At [J].

Byrne, AP ;

Bayer, S ;

Dracoulis, GD ;

Kibedi, T .

PHYSICAL REVIEW LETTERS, 1998, 80 (10) :2077-2080

[10] OCTUPOLE COUPLING AND PROTON-NEUTRON INTERACTIONS IN FR-214 [J].

BYRNE, AP ;

LANE, GJ ;

DRACOULIS, GD ;

FABRICIUS, B ;

KIBEDI, T ;

STUCHBERY, AE ;

BAXTER, AM ;

SCHIFFER, KJ .

NUCLEAR PHYSICS A, 1994, 567 (02) :445-476

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