E2 decay strength of the M1 scissors mode of 156Gd and its first excited rotational state

被引：27

作者：

Beck, T. ^{[1
]}

Beller, J. ^{[1
]}

Pietralla, N. ^{[1
]}

Bhike, M. ^{[2
,3
]}

Birkhan, J. ^{[1
]}

Derya, V. ^{[4
]}

Gayer, U. ^{[1
]}

Hennig, A. ^{[4
]}

Isaak, J. ^{[5
,6
,7
]}

Loeher, B. ^{[5
,6
,7
]}

Ponomarev, V. Yu. ^{[1
]}

Richter, A. ^{[1
]}

Romig, C. ^{[1
]}

Savran, D. ^{[5
,6
,7
]}

Scheck, M. ^{[1
,8
,9
]}

Tornow, W. ^{[2
,3
]}

Werner, V. ^{[1
]}

Zilges, A. ^{[4
]}

Zweidinger, M. ^{[1
]}

机构：

[1] Tech Univ Darmstadt, Inst Kernphys, Schlossgartenstr 9, D-64289 Darmstadt, Germany

[2] Duke Univ, Dept Phys, Durham, NC 27708 USA

[3] Triangle Univ Nucl Lab, Durham, NC 27708 USA

[4] Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany

[5] GSI Helmholtzzentrum Schwerionenforsch, ExtreMe Matter Inst EMMI, Planckstr 1, D-64291 Darmstadt, Germany

[6] GSI Helmholtzzentrum Schwerionenforsch, Res Div, Planckstr 1, D-64291 Darmstadt, Germany

[7] FIAS, Ruth Moufang Str 1, D-60438 Frankfurt, Germany

[8] Univ West Scotland, Sch Engn & Comp, Paisley PA1 2BE, Renfrew, Scotland

[9] Scottish Univ Phys Alliance, Glasgow G12 8QQ, Lanark, Scotland

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 21期

关键词：

HI-GAMMA-S; INELASTIC ELECTRON-SCATTERING; EINSTEIN CONDENSED GAS; LOW-LYING M1; DIPOLE EXCITATIONS; NUCLEAR-DEFORMATION; PHOTON SCATTERING; COLLECTIVE MODES; SUPERFLUIDITY; DEPENDENCE;

D O I：

10.1103/PhysRevLett.118.212502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The E2/M1 multipole mixing ratio delta(1 -> 2) of the 1(sc)(+)-> 2(1)(+) gamma- ray decay in Gd-156 and hence the isovector E2 transition rate of the scissors mode of a well-deformed rotational nucleus has been measured for the first time. It has been obtained from the angular distribution of an artificial quasimonochromatic linearly polarized gamma-ray beam of energy 3.07(6) MeV scattered inelastically off an isotopically highly enriched Gd-156 target. The data yield first direct support for the deformation dependence of effective proton and neutron quadrupole boson charges in the framework of algebraic nuclear models. First evidence for a low-lying J(pi) = 2(+) member of the rotational band of states on top of the 1(+) band head is obtained, too, indicating a significant signature splitting in the K = 1 scissors mode rotational band.

引用

页数：5

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