Nuclear spin scissors mode – experimental status

A new type of nuclear collective motion - the spin scissors mode - was predicted seven years ago. Promising signs of its existence in 232Th were found. We perform a systematic analysis of experimental data on M1 excitations in rare-earth nuclei to find traces of the spin scissors mode in this area. Obvious signs of its existence are demonstrated.

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Fine structure of the nuclear scissors mode (new type of collective motion)

Journal of Physics Conference Series ◽

10.1088/1742-6596/366/1/012002 ◽

2012 ◽

Vol 366 ◽

pp. 012002

Author(s):

E B Balbutsev ◽

I V Molodtsova

Keyword(s):

Fine Structure ◽

Collective Motion ◽

Scissors Mode ◽

New Type

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Explanation of the puzzle of 164Dy scissors

EPJ Web of Conferences ◽

10.1051/epjconf/201819404005 ◽

2018 ◽

Vol 194 ◽

pp. 04005 ◽

Cited By ~ 1

Author(s):

Evgeny Balbutsev ◽

Irina Molodtsova

Keyword(s):

Wigner Function ◽

Nuclear Spin ◽

Scissors Mode ◽

Moments Method ◽

New Type ◽

Lower Group

The solution of TDHFB equations by Wigner Function Moments method with the isovectorisoscalar coupling taken into account leads to the prediction of the new type of nuclear spin scissors mode. It turns out that the lower group of M1 excitations in 164Dy, which is usually not included in the systematics of the scissors mode, can be quite naturally attributed to this new type of scissors.

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New type of nuclear collective motion: The spin scissors mode

Physical Review C ◽

10.1103/physrevc.88.014306 ◽

2013 ◽

Vol 88 (1) ◽

Cited By ~ 13

Author(s):

E. B. Balbutsev ◽

I. V. Molodtsova ◽

P. Schuck

Keyword(s):

Collective Motion ◽

Scissors Mode ◽

New Type

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NUCLEAR SHAPE PROPERTIES OF THE EVEN–EVEN NEUTRON-RICH RARE-EARTH NUCLEI

International Journal of Modern Physics E ◽

10.1142/s0218301305002965 ◽

2005 ◽

Vol 14 (02) ◽

pp. 197-213 ◽

Cited By ~ 14

Author(s):

N. BENHAMOUDA ◽

N. H. ALLAL ◽

M. FELLAH ◽

M. R. OUDIH

Keyword(s):

Experimental Data ◽

Rare Earth ◽

Mean Field ◽

Magic Number ◽

Nuclear Shape ◽

The Other ◽

Shell Closure ◽

Kink Effect ◽

Prolate Shape ◽

Rare Earth Nuclei

The physical properties of the nuclear shape have been investigated through the charge square radius (<r2>) and the quadrupole (Q2) and hexadecapole (Q4) moments of the even–even neutron-rich rare-earth nuclei. The single-particle energies used are those of a deformed Woods–Saxon mean-field. The pairing effects have been included by means of an exact projection method. The model has been tested for the "ordinary" nuclei near the shell closure N = 82 and has correctly reproduced the experimental data and particularly the "Kink" effect. The study has then been extended to the neutron-rich nuclei and has shown a stability of the <r2> and Q2 results for N≃100 which may be attributed to the existence of a new magic number. On the other hand, a saturation of the prolate shape appears around N = 108 for the elements Nd , Sm and Gd and near N = 102 for the Dy , Er and Yb . These observations could not be confirmed by the investigation of the hexadecapole moment.

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