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Nuclear Excitation Functions and Thick-Target Yields: Zn + d and Ar 40 ( d , α</…

1963; American Institute of Physics; Volume: 130; Issue: 1 Linguagem: Inglês

10.1103/physrev.130.265

1536-6065

D. C. Williams, John W. Irvine,

Astronomical and nuclear sciences

Radiochemical techniques have been used to determine partial or complete excitation functions to 15 MeV for the reactions ${\mathrm{Ar}}^{40}(d,\ensuremath{\alpha}){\mathrm{Cl}}^{38}$, ${\mathrm{Zn}}^{66}(d,\ensuremath{\alpha}){\mathrm{Cu}}^{64}$, ${\mathrm{Zn}}^{64}(d,\ensuremath{\alpha}n){\mathrm{Cu}}^{61}$, ${\mathrm{Zn}}^{67}(d,\ensuremath{\alpha}n){\mathrm{Cu}}^{64}$, ${\mathrm{Zn}}^{64}(d,2p){\mathrm{Cu}}^{64}$, and ${\mathrm{Zn}}^{67}(d,2p){\mathrm{Cu}}^{67}$. The results have been compared with the predictions of the statistical model of nuclear reactions. Most features of the ($d,\ensuremath{\alpha}$) and ($d,\ensuremath{\alpha}n$) excitation functions measured are consistent with the predictions of the model. The ${\mathrm{Zn}}^{67}(d,2p){\mathrm{Cu}}^{67}$ reaction appears to take place essentially by a direct process, while the ${\mathrm{Zn}}^{64}(d,2p){\mathrm{Cu}}^{64}$ reaction, which has a much higher cross section, agrees with the model. Support is found for a rather large value of the nuclear radius parameter, ${r}_{0}=1.7$ F. Excitation functions are presented for the reactions ${\mathrm{Zn}}^{64}(d,p){\mathrm{Zn}}^{65}+{\mathrm{Zn}}^{64}(d,n){\mathrm{Ga}}^{65}({\ensuremath{\beta}}^{+}){\mathrm{Zn}}^{65}$, ${\mathrm{Zn}}^{66}(d,n){\mathrm{Ga}}^{67}$, and ${\mathrm{Zn}}^{66}(d,2n){\mathrm{Ga}}^{66}$. Thick-target yields from deuteron bombardment of metallic zinc are given for ${\mathrm{Cu}}^{61}$, ${\mathrm{Cu}}^{64}$, ${\mathrm{Cu}}^{67}$, ${\mathrm{Zn}}^{65}$, ${\mathrm{Ga}}^{66}$, and ${\mathrm{Ga}}^{67}$.