M1 γ strength for zirconium nuclei in the photoneutron channel

被引：49

作者：

Utsunomiya, H. ^{[1
]}

Goriely, S. ^{[2
]}

Kondo, T. ^{[1
]}

Kaihori, T. ^{[1
]}

Makinaga, A. ^{[1
]}

Goko, S. ^{[3
]}

Akimune, H. ^{[1
]}

Yamagata, T. ^{[1
]}

Toyokawa, H. ^{[4
]}

Matsumoto, T. ^{[4
]}

Harano, H. ^{[4
]}

Hohara, S. ^{[5
]}

Lui, Y. -W. ^{[6
]}

Hilaire, S. ^{[7
]}

Peru, S. ^{[7
]}

Koning, A. J. ^{[8
]}

机构：

[1] Konan Univ, Dept Phys, Higashinada Ku, Kobe, Hyogo 6588501, Japan

[2] Univ Libre Bruxelles, Inst Astron & Astrophys, B-1050 Brussels, Belgium

[3] Japan Atom Energy Agcy, Naka, Ibaraki 3191195, Japan

[4] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan

[5] Kinki Univ, Atom Energy Res Inst, Osaka 5778502, Japan

[6] Texas A&M Univ, Inst Cyclotron, College Stn, TX 77843 USA

[7] Serv Phys Nucl, Dept Phys Theor & Appl, F-91680 Bruyeres Le Chatel, France

[8] Nucl Res & Consultancy Grp, NL-1755 ZG Petten, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.100.162502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Photoneutron cross sections were measured for Zr-91, Zr-92, and Zr-94 near the neutron separation energy with quasimonochromatic gamma rays. The data exhibit some extra components around the neutron threshold. A coherent analysis of the photoneutron data for Zr-92 together with the neutron capture on Zr-91 based on the microscopic Hartree-Fock-Bogoliubov plus quasiparticle random-phase approximation model for the E1 strength has revealed the presence of an M1 resonance at 9 MeV. The microscopic approach systematically shows the same M1 strength in the photoneutron cross section for Zr-91 and Zr-94. The total M1 strength is about 75% larger than the strength predicted by the systematics, being qualitatively consistent with the giant M1 resonance observed in the inelastic proton scattering.

引用

页数：4

共 50 条

[41] M1 TRANSITION PROBABILITIES IN ODD-MASS DEFORMED NUCLEI
SEAMAN, GG
BERNSTEIN, EM
PALMS, JM
PHYSICAL REVIEW, 1967, 161 (04): : 1223 - +
[42] BETA-DECAY AND M1 DECAY RATES FOR A = 20 NUCLEI
ANANTHANARAYANAN, K
NUCLEAR PHYSICS A, 1970, A159 (01) : 45 - +
[43] Spin scissors mode and the fine structure of M1 states in nuclei
Balbutsev, E. B.
Molodtsova, I. V.
Schuck, P.
NUCLEAR PHYSICS A, 2011, 872 (01) : 42 - 68
[44] EMPIRICALLY OPTIMUM M1 OPERATOR FOR SD-SHELL NUCLEI
BROWN, BA
WILDENTHAL, BH
NUCLEAR PHYSICS A, 1987, 474 (02) : 290 - 306
[45] PION CONDENSATION IN NUCLEI AND L-FORBIDDEN M1 TRANSITIONS
SAPERSHTEIN, EE
TROITSKII, MA
JETP LETTERS, 1975, 21 (02) : 62 - 63
[46] STRONG SELECTION-RULES FOR M1 TRANSITIONS IN ROTATING NUCLEI
HAMAMOTO, I
PHYSICS LETTERS B, 1981, 102 (04) : 225 - 228
[47] E2 and M1 strengths in heavy deformed nuclei
Draayer, JP
Popa, G
Hirsch, JG
ACTA PHYSICA POLONICA B, 2001, 32 (09): : 2697 - 2710
[48] M1 SPIN STRENGTH DISTRIBUTION IN SM-154
SARRIGUREN, P
DEGUERRA, EM
NOJAROV, R
FAESSLER, A
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 1993, 19 (02) : 291 - 298
[49] STUDY OF THE M1 ISOVECTOR STRENGTH IN SI-28
MACGREGOR, IJD
JOHNSTON, A
EWING, JS
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 1992, 18 (07) : 1195 - 1206
[50] MEASUREMENT OF THE EXTENSIONAL VISCOSITY OF M1 IN A CONVERGING CHANNEL RHEOMETER
JAMES, DF
CHANDLER, GM
ARMOUR, SJ
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS, 1990, 35 (2-3) : 445 - 458

← 1 2 3 4 5 →