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Decay Analysis of Ge Isotopes Formed in Reactions Induced by Tightly and loosely Bound Projectiles

Communications in Theoretical Physics 2018年第11期69卷 565-577页

作者： Amandeep Kaur Kirandeep Sandhu Manoj K.Sharma School of Physics and Materials Science Thapar Institute of Engineering and Technology Patiala 147004PunjabIndia Department of Physics GSSDGS Khalsa CollegePatiala 147001PunjabIndia

The dynamical cluster-decay model (DCM) is employed to investigate the decay of ^(6870)Ge~* compound nuclei formed respectively via tightly (~4He) and loosely (~6He) bound projectiles, using ^(64)Zn target. The study is carried out over a wide energy range (E_(c.m.)～5 MeV to 16 MeV) by including the quadrupole deformations (β_(2i)) and optimum orientations (θ_i^(opt)) of the decaying fragments. The fusion cross-sections, obtained by adding various evaporation channels show nice agreement with the experimental data for ~4He+^(64)Zn reaction. The contribution from competing compound inelastic scattering channel is also analyzed particularly for ^(68)Ge~* nucleus at above barrier energies. On the other hand,the decrement in the fusion cross-sections of ^(70)Ge~* nuclear system is addressed by presuming that ^(65)Zn ER is formed via two different modes:(i) the αn evaporation of ^(70Ge)~* nucleus, and(ii) 1n-evaporation of ^(66)Zn~*nuclear system,formed via breakup and 2n-transfer channels due to halo structure of the ~6He projectile. Besides this, the suppression in2 np evaporation cross-sections suggests the contribution of another breakup and transfer process of ~6He i.e. ~4He+ ^(64)Zn.The contribution of breakup+transfer channels for ~6He+^(64)Zn reaction is duly addressed by applying relevant energy corrections due to the breakup of "~6He" projectile into 2n and ~4He. In addition to this, the barrier lowering, angular momentum and energy dependence effects are also explored in view of the dynamics of chosen reactions.

关键词： tightly and loosely bound projectiles evaporation residue breakup and transfer

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Research on in part "loosely" coordinated trinuclear molybdenum cluster compounds—— the synthesis and crystal structure of {Mo3（μ3-S）(μ-S)3[S2P（OEt）2]4·P（C6H5）3} （0.86CH2Cl2）

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Chinese Journal of Chemistry 1986年第4期4卷 301-310页

作者： HUANG Jian-Quan LU Shao-Fang LIN Yu-Hui HUANG Jin-Ling LU Jia-Xi Fujian Institute of Research on the Structure of Matter, Academia Sinica, Fuzhou Fujian Institute of Research on the Structure of Matter Academia Sinica Fuzhou

The synthesis and crystal structure of novel trinuclear molybdenum cluster compoundwith somewha "loose" coordination site {Mo3（μ3-S）(μ-S)3[S2P（OEt）2]4· P（C6H5）3}'·（0.86 CH2Cl2）have been reported. The cluster crystallizes in the spece group Pl with two molecules in a unit cellwhose parameters are a=10.472（4）, b=14.375（2）, c=21.695（3）; a=74.O4（1）°, β=76.50（2）°, γ=72.22（2）°, v=2950 and D_o=1.693 g.cm-x. On the basis of 4840 independent reflections with I≥2σ（1）.the structure was solved by heavy atom method and Fourier method and refined by full-matrixleast-squares techniques to a final R=0.058. The distances between Mo atoms in this cluster are 2.731（1）, 2.748（1） and 2.753（1） respetively.The mean value of Mo--Mo bond lengths is slighly shorter than those in other trinuclear Mo clusterswith "looscly coordinated" site. In addition, the PPh3ligand is loosely coordinated to one Mo atomin direction opposite to the μ3-S with Mo--P bond length of 2.647（3）. This is different from theother strocturally analogous clusters, in which the loosely coordinated ligand is trans to μ2--S. Asummary of Mo--Mo and Mo-L bonding for such clusters is given.

关键词： Mo3 the synthesis and crystal structure of OEt Research on in part S2P coordinated trinuclear molybdenum cluster compounds loosely CH Cl

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