Isobaric analogue resonances in71As through proton elastic scattering on70Ge

The analogues of the low-lying levels in71Ge have been observed as resonances in the compound nucleus71As through proton elastic scattering on70Ge in the energy range Ep=3.5 to 5.3 MeV. The excitation functions cover the analogue resonances corresponding to states upto 2.3 MeV excitation in71Ge. The sub-structures in the 5.06 MeV resonance, first observed by Temmer and co-workers have been confirmed in the present experiment. The present investigation reveals similar sub-structures in the 4.13 MeV resonance lending further support to the existence of intermediate structure near an isobaric analogue resonance. The resonance parameters and the spectroscopic factors (for the corresponding parent states) have been extracted. The results are compared with the information available from the70Ge(d, p)71Ge reaction. © 1977 the Indian Academy of Sciences

Rotational bands in79Kr

The level scheme of79Kr has been studied through the79Br(p,n)79Kr reaction at proton energies from 1·7 to 5·0 MeV.γ-ray and internal conversion electron measurements were made using Ge(Li) detectors and a six gap “Orange” electron spectrometer. The level scheme was established by determining the thresholds of variousγ-rays and byγ-γ and n-γ coincidence measurements. New levels at 402, 450, 660, 676, 695, 720, 810, 836, 907 and 1038 keV not observed in earlier radioactivity studies have been established. DefiniteJπ assignments have been made to most of the levels below 800 keV. Many of the low-lying levels are identified as rotational levels based on the (301 ↓) 1/2−, (301 ↑) 3/2− and (431 ↓) 1/2+ Nilsson states

Isobaric analog resonances in arsenic-​71

The isobaric analog resonances in 71As [16685-​55-​5] were studied with the 70Ge(p,​p) reaction at 3.9-​5.3 MeV. The anomalies in the excitation functions were identified as the isobaric analog resonances in 71As. Resonance l-​value assignments are presented. States are tentatively assocd. with levels in the 2nd well of a deformed Ge nucleus

\chem{^{16}O}-induced transfer reactions on \chem{^{90}Zr}

Cross-section for transfer reactions $^{90}$Zr($^{16}$O, X) have been measured at an incident energy of 90 MeV. The angular distribution of the elastic scattering $^{90}$Zr($^{16}$O,$^{16}$O)$^{90}$Zr, the inelastic scattering to excited states of $^{90}$Zr, the one-nucleon transfer reactions $^{90}$Zr($^{16}$O,$^{15}$N)$^{91}$Nb (g.s., 0.104 and 3.37 MeV states), $^{90}$Zr($^{16}$O,$^{15}$O)$^{91}$Zr (g.s. and 2.17 MeV state) $^{90}$Zr($^{16}$O,$^{17}$O)$^{91}$Zr (g.s.) and the two-nucleon transfer reactions $^{90}$Zr($^{16}$O,$^{14}$C)$^{92}$Mo (ground and 1st excited states) are analyzed in the coupled-reaction-channel (CRC) formalism. Starting with a double-folded real potential, the elastic-scattering angular distribution is calculated using the CRC code FRESCO. The absorptive potential is then generated through the coupling of various inelastic and transfer processes that occur at the nuclear surface. Addition of a short-range imaginary potential in the coupling scheme, whose purpose was to take into account the effect due to loss of flux in fusion channel, reproduces the measured elastic-scattering angular distribution. A good description of all the quasi-elastic data has been achieved and the absolute magnitudes are reproduced without any arbitrary normalization. The relative importance of the one-step cluster transfer of two protons vs. the two-step successive transfer has been studied