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首页> 外文期刊>Physical review, C >Shape evolution with increasing angular momentum in the Ga-66 nucleus
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Shape evolution with increasing angular momentum in the Ga-66 nucleus

机译：随着GA-66核中的角动量增加的形状演变

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摘要

The high-spin nuclear structure of the odd-odd Ga-66 nucleus was probed using heavy-ion induced fusion-evaporation reaction. The de-exciting gamma rays were detected by using the Indian National Gamma Array (INGA) consisting of high resolution Compton suppressed clover detectors. The level scheme of Ga-66 was extended up to an excitation energy (E-x) of similar to 10.6 MeV with spin parity of 21((+)). Two new quadrupole bandlike structures, one positive and one negative parity, based on the states having spin parity of J(pi) = 11(+) and 10(-), respectively, were found. The experimental energy levels are compared with calculations within the framework of shell model calculation using jj44bpn effective interaction. The agreement between experiment and theory is good. The total Routhian surface calculations were performed to understand the shape of the Ga-66 nucleus associated with the configurations nu(g(9/2))(3) nu(f(5/2))(2) pi(g(9/2))(1) pi(f(5/2))(2) and nu(g(9/2))(2) nu(f(5/2))(1) pi(g(9/2))(1) pi(f(5/2))(2) assigned to the positive and negative parity bands, respectively. In the frequency domain omega = 0.20-0.30 MeV, both the negative and positive parity quadrupole structures, favor prolate deformation whereas at omega = 0.50 MeV there is a sudden change to noncollective oblate shape in both the bands.
机译：用重离子诱导的聚变蒸发反应研究了Ga-66奇数核的高自旋核结构。使用由高分辨率康普顿抑制三叶草探测器组成的印度国家伽马阵列（INGA）探测去激发伽马射线。Ga-66的能级方案被扩展到激发能（E-x）类似于10.6mev，自旋宇称为21（+）。基于自旋宇称分别为J（pi）=11（+）和10（-）的态，我们发现了两个新的四极带结构，一个正宇称和一个负宇称。将实验能级与使用jj44bpn有效相互作用的壳模型计算框架内的计算进行了比较。实验和理论之间的一致性很好。进行了总Routhian表面计算，以了解与分别分配给正宇称带和负宇称带的构型nu（g（9/2））（3）nu（f（5/2））（2）pi（g（9/2））（1）pi（f（5/2））（2）和nu（g（9/2））（2）nu（f（5/2））（1）pi（g（9/2））（1）pi（f（5/2））（2）相关联的Ga-66核的形状。在频域ω=0.20-0.30 MeV时，负宇称四极结构和正宇称四极结构都有利于长形变形，而在ω=0.50 MeV时，两个带中的非聚集扁圆形状都发生了突变。

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  • 来源
    《Physical review, C》 |2017年第5期|共13页
  • 作者

    Bhattacharjee S. S.; Singh R. P.; Muralithar S.; Bala Indu; Garg R.; Rajbanshi S.; Singh D.; Dhal A.; Raju M. Kumar; Saha S.; Sethi J.; Palit R.;

  • 作者单位

    Inter Univ Accelerator Ctr Aruna Asaf Ali Marg New Delhi 110067 India;

    Inter Univ Accelerator Ctr Aruna Asaf Ali Marg New Delhi 110067 India;

    Inter Univ Accelerator Ctr Aruna Asaf Ali Marg New Delhi 110067 India;

    Inter Univ Accelerator Ctr Aruna Asaf Ali Marg New Delhi 110067 India;

    Inter Univ Accelerator Ctr Aruna Asaf Ali Marg New Delhi 110067 India;

    Dum Dum Motijheel Coll Dept Phys Kolkata 700074 India;

    Cent Univ Jharkhand Ctr Appl Phys Ranchi 835205 Bihar India;

    Variable Energy Cyclotron Ctr Kolkata 700064 W Bengal India;

    Andhra Univ Nucl Phys Dept Visakhapatnam 530003 Andhra Pradesh India;

    Tata Inst Fundamental Res Homi Bhabha Rd Bombay 400005 Maharashtra India;

    Tata Inst Fundamental Res Homi Bhabha Rd Bombay 400005 Maharashtra India;

    Tata Inst Fundamental Res Homi Bhabha Rd Bombay 400005 Maharashtra India;

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  • 正文语种 eng
  • 中图分类 原子核物理学、高能物理学;
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