Spins of levels in41Ca from (d,pγ) angular correlations

Proton-gamma ray angular correlations are reported for the (d, p) reaction populating levels in⁴¹Ca withl _n=1. The method differs from previous measurements in that all observed gamma ray transitions from each level of interest are included in the correlation. A spin and parity of 3/2^? is deduced for the 1.943, 2.462, 4.187 and 4.604 MeV levels. The results for the 3.944 and 4.753 MeV levels are consistent with a spin and parity assignment of 1/2^?.     

The mass spectra of N-phenylphosphoramidate esters

The mass spectra of diethyl and diphenyl N-phenylphosphoramidate are reported. Their electron-impact behavior is similiar to that observed for the corresponding phosphate esters. High resolution mass measurements are used to confirm the elemental composition of all the peaks in the spectra. Some interesting rearrangement fragments are observed in the spectrum of the diphenyl N-phenylphosphoramidate ester.     

Study of the reactions31P(α,p)34S and29Si(α,n)32S

The (α,p) reaction on³¹P in the energy rangeE _α=3.25 to 5.25 MeV and the (α,n) reaction on²⁹Si in the energy rangeE _α=3 to 4.8 MeV, have been used to determine nuclear properties of³⁵Cl and³³S respectively. Resonance energies, strengths and partial widths are reported. The analysis of angular distribution measurements yields spin values for 23 resonance levels in³⁵Cl and 14 levels in³³S.     

Excitation of the analogue of the T> giant dipole resonance of90Zr via the (n,p) reaction

Proton spectra have been measured at lab angles ofθ=0° to 100° for the reaction Zr(n, p)Y at 21.8 MeV incident neutron energy. Spectra over an angular spread of 80° were accumulated simultaneously using a detection system consisting of proportional counterΔE detectors and a curved plastic scintillator as energy detector. Resonant behaviour is observed in the proton spectra for the Zr(n, p)Y reaction but not for the Fe(n, p)Mn reaction. The resonant structure is attributed to the excitation of the analogues ofT _> giant dipole states of Zr. The resonant structure is shown to correspond in position, gross and fine structure, and, in strength and angular dependence of the cross sections, with expectations for the⁹⁰Zr(n, p)⁹⁰Y reaction. DWBA cross sections are derived and fitted to the experimental data with a Lane potential of 150 MeV.