排序方式: 共有113条查询结果,搜索用时 15 毫秒
41.
在中国原子能科学研究院H13串列加速器上,通过重离子核反应122Sn(16O,4n)对A=130缺中子核区的134Ce核的高自旋态进行了研究,建立了134Ce的新的能级纲图,最高自旋态扩展到22.然而实验结果与近期发表的134Ce核的高自旋态结果不同,所谓在134Ce核中存在的磁转动带结构不能被实验证实.对实验结果的分析表明,134Ce核的高自旋态结构呈现出重要的形状共存特性在基带以上的回弯处的10+态起源于两个中子组态,基于此10+态的转动带具有γ≈–60°的扁椭形变;另一个10+同质异能态为yrast陷阱,也起源于两中子组态,为具有γ≈–120°的长椭形状;而由两个signature伙伴带组成的强耦合带,则起源于h11/2与g7/2质子组态,为具有γ≈0°的长椭形变带. 相似文献
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奇奇核170Ta高自旋态及旋称反转研究 总被引:1,自引:1,他引:0
用97MeV的19F束通过155Gd(19F,4n)170Ta反应布居了奇奇核170Ta的高自旋态,将170Ta的3个转动带推向了更高的自旋态,并观测到了半退耦带的旋称反转点,将其自旋值定在了19.5h.首次比较系统地总结了稀土区半退耦带的旋称反转系统规律,并比较了该核区半退耦带与晕带的系统性差异,特别是这两个带在能量劈裂程度上存在着系统性差异.从这一现象出发,探讨了半退耦带与晕带旋称反转系统性差异的成因,指出p-n剩余相互作用在这一现象中起着非常重要的作用. 相似文献
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High spin states of 128La have been studied through the fusion-evaporation reaction 118Sn(14N,4n) 128La at a beam energy of 69 MeV. A positive-parity side band with the same configuration as that of the yrast band has been identified. Moreover, it is noted that the energy separation △E(I) = E(I)side-E(I)yrast of all doublet bands reported in odd-odd nuclei in the A~130 mass region exhibit a staggering pattern systematically, and they stagger up at even-spin and stagger down at odd-spin. 相似文献
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High-spin states of ^165Er were studied using the ^160Gd(^9Be, 4n)reaction at beam energies of 42 and 45 MeV. The previously known bands based on the ν5/2^-[523] and ν5/2^+[642] configurations have been extended to high-spin states. Electric-dipole transitions linking these two opposite parity bands were observed. Relatively large B(E1) values have been extracted experimentally and were attributed to octupole softness. 相似文献
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The high-spin states of 159Lu were populated by fusion-evaporation reaction 144Sm (19F, 4n) with beam energy 106 MeV. A new level scheme was established, which consists of the yrast band with negative parity, the octupole vibration band based on the states and quasipartical band with positive parity. The high spin states of 159Lu were discussed by systemic characteristics. 相似文献
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Low-lying and high-spin states of ^124 Cs are studied through the ^116 Sn(^11 B,3n)^124 Cs reaction at a beam energy of 45 MeV. Several new linking transitions are observed, including three transitions between the yrast and πh11/2 vd3/2 bands and two transitions between the yrast and πh11/2 v(d5/2, g7/2) bands. These transitions fix the excitation energy of the yrast band and its decay path, and confirm the existence of eight E1 finking transitions between the yrast and πh11/2 v(d5/2, 97/2) bands observed before. These E1 linking transitions infer the oetupole correlation in ^124Cs. The decay paths of the yrast band are investigated, and discrepancies in the level scheme of ^124Cs in the latest two studies are clarified. The reason for the discrepancies is discussed. A new decoupled band is established and temporarily assigned as the unfavored signature partner of πh11/2 vd3/2 configuration. 相似文献
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The high-spin states of 110Ag were populated via fusion evaporation reaction 110Pd(7Li, 2p2n)110Ag and a new level scheme has been presented. The systematics of signature splitting and signature inversion of the πg9/2⊙νh11/2 configuration band in Ag isotopes are studied. The spin of inversion point decreases with increasing neutron number and this feature is explained as due to the competition between the p-n residual interaction and the Coriolis force. 相似文献
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The high spin states of 106Ag were populated via the fusion-evaporation reaction 100Mo(11B,5n)106Ag at a beam energy of 60 MeV. A new level scheme of 106Ag is presented. The positive parity band based on the configuration of πg9/2⊙ν[h211/2(g7/2/d5/2)] is assigned to magnetic rotation band of shears mechanism. Theoretical calculation of the effective interaction on the basis of TAC mode were also performed, the calculated results agrees well with the value extracted from the experiment. 相似文献
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