Cross sections of theZn67(n,α)64

Abstract

Experimental cross section data of the 67 Zn(n,α) 64 Ni reaction are very scanty because the residual nucleus 64 Ni is stable and the commonly used activation method is not feasible. As a result, very large deviations (about 10 times) exist among different nuclear data libraries. In the present work, cross sections of the partial 67 Zn(n,α 0 ) 64 Ni and total 67 Zn(n,α) 64 Ni reactions are measured at neutron energies of 4.0 and 5.0 MeV for the first time, and those of 6.0 MeV are remeasured for consistency checking. A twin-gridded ionization chamber was used as the charged-particle detector and two enriched back-to-back-set 67 Zn samples were adopted. Experiments were performed at the 4.5 MV Van de Graaff Accelerator of Peking University. Neutrons were produced through the 2 H(d, n) 3 He reaction using a deuterium gas target. Absolute neutron flux was determined by counting the fission fragments from a 238 U sample placed inside the gridded ionization chamber while a BF 3 long counter was employed as neutron flux monitor. Present data are compared with results of previous measurements, evaluations, and TALYS code calculations.

Validation of an optical potential for incident and emitted low-energy $$\alpha $$-particles in the $$A\sim 60$$ mass range

“…2) are compared in the following with measured cross sections of low-energy proton-and neutron-induced reactions leading to excited Fe, Co, Cu, and Zn isotopes. A particular attention will be payed to the recent data, e.g., [22][23][24][25][26][27]. The aim is to ascertain either the account of the α-particle emission by the α-particle OMP [14] or eventual questions that may still need further consideration.…”

“…Moreover, validation of the OMP [14] for α-emission in low-energy proton-induced reactions on Zn isotopes, at variance with the fast-neutron induced reactions on Zr isotopes [21], was related to a surface character of the latter [20]. Analysis of α-emission from nuclei excited in reactions induced by either neutrons or low-energy protons became thus of interest while there are quite useful recent data of low-lying states feeding [22][23][24][25][26][27] for A ∼ 60 nuclei.…”

“…3 with measured cross sections of low-energy proton-and neutron-induced reactions leading to excited Fe, Co, Cu, and Zn isotopes, with particular emphasis of above-mentioned Refs. [22][23][24][25][26][27]. The main points of the DI analysis within the distorted-wave Born approximation (DWBA) method and the code FRESCO [32], for calculation of pickup reaction cross sections, are also given in Sect.…”

Progress of experimental researches on neutron induced light charged-particle emission nuclear reactions

“…同时发表在Physical Review C上 [59,60] . 接下来, 我们将 依托北京大学4.5 MV静电加速器, 改进实验方案在 图 2 (网络版彩图)测量 10 B(n,t2α)反应所用的薄衬 10 B样 品 [59] (2) 中重核 中重核方面, 对多种与反应堆结构材料辐射损伤 有关的(n,α)反应微分截面或截面进行了实验测量与理 论分析, 包括 25 Mg, 35 Cl, 39 K, 40 Ca, 54,56,57 Fe, 58 Ni, 63 Cu, 64,67 Zn (n,α)反应等 [61][62][63][64][65][66][67][68] . [69][70][71][72][73] .…”

Cross sections of the 144Sm(n,α)141Nd and 66Zn(n,α)63Ni reactions at 4.0, 5.0 and 6.0 MeV

“…The (n,α) reaction cross sections for zinc a e-mail: ygledenov@gmail.com isotopes we have measured contain the 64 Zn(n,α) 61 Ni reaction at E n = 2.5, 4.0, 5.0, 5.5 and 6.0 MeV and the 67 Zn(n,α) 64 Ni reaction at E n = 4.0, 5.0 and 6.0 MeV [5,6]. In the present work, we measured the 144 Sm(n,α) 141 Nd and 66 Zn(n,α) 63 Ni reactions at E n = 4.0, 5.0 and 6.0 MeV.…”