Soft octupole vibrations on superdeformed states in nuclei around 40Ca suggested by Skyrme-HF and self-consistent RPA calculations

Soft octupole vibrations on superdeformed states in nuclei around 40Ca suggested by Skyrme-HF and self-consistent RPA calculations
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DOI：
10.1140/epjad/i2005-06-111-4
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发表时间：
2005-08
期刊：
The European Physical Journal A - Hadrons and Nuclei
影响因子：
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通讯作者：
T. Inakura;H. Imagawa;Y. Hashimoto;M. Yamagami;S. Mizutori;K. Matsuyanagi
T. Inakura;H. Imagawa;Y. Hashimoto;M. Yamagami;S. Mizutori;K. Matsuyanagi
中科院分区：
其他
文献类型：
--
作者：
T. Inakura;H. Imagawa;Y. Hashimoto;M. Yamagami;S. Mizutori;K. Matsuyanagi

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本文给出了40Ca超形变态上低频负宇称模的完全自洽RPA计算结果。RPA的计算是在一个盒子中的三维笛卡尔网格上使用混合表示进行的。SD壳层结构为八极形状的涨落提供了非常有利的条件，我们证明了质子和中子的相干激发在N = Z核、32S、36Ar、40Ca和44Ti的强集体八极振动的出现中起着重要的作用，而不是在SD态上.特别是，计算表明，在40Ca的SD态上出现了一个低频的、强的集体K Δ= 1−八极振动。
We present the results of fully self-consistent RPA calculation for low-frequency negative-parity modes built on superdeformed states in the40Ca region. The RPA calculation was carried out using the mixed representation on the three-dimensional Cartesian mesh in a box. The SD shell structure provides a very favorable situation for octupole shape fluctuations, and we show that the coherent excitation of protons and neutrons play an important role in the emergence of strongly collective octupole vibrations buit on the SD states in theN=Znuclei,32S,36Ar,40Ca and44Ti. In particular, the calculation suggests that a low-frequency, strongly collectiveKΔ= 1−octupole vibration appears on the SD state in40Ca.