A study of low-lying states in the self-conjugate nucleus 48Cr has been performed with the reaction 40Ca(10B, pnγ)48Cr. Several techniques of γ-ray spectroscopy have been used: activity measurements, γ-ray angular distributions, γ-γ coincidences, p-n-γ triple coincidences, and recoil-distance lifetime measurements. The following level energies, spin-parity assignments, and lifetimes have been found: 752.4±0.5 keV, 21+, τm = 9.7±2.6 ps; 1858.7±0.7 keV, 41+, τm = 1.5-0.5+2.0 ps; 3532.7±1.2 keV, (61+); 4064.3±1.3 keV, (≧ 4), τm < 60 ps. The 21+ state in 48Cr is found to have the lowest excitation energy and highest E2 transition strength (33±9 W.u.) among the 21+ states of even nuclei in the 1f 7 2 shell. © 1973.
Gamma-ray spectroscopy of 48Cr
SIGNORINI, COSIMO;
1973
Abstract
A study of low-lying states in the self-conjugate nucleus 48Cr has been performed with the reaction 40Ca(10B, pnγ)48Cr. Several techniques of γ-ray spectroscopy have been used: activity measurements, γ-ray angular distributions, γ-γ coincidences, p-n-γ triple coincidences, and recoil-distance lifetime measurements. The following level energies, spin-parity assignments, and lifetimes have been found: 752.4±0.5 keV, 21+, τm = 9.7±2.6 ps; 1858.7±0.7 keV, 41+, τm = 1.5-0.5+2.0 ps; 3532.7±1.2 keV, (61+); 4064.3±1.3 keV, (≧ 4), τm < 60 ps. The 21+ state in 48Cr is found to have the lowest excitation energy and highest E2 transition strength (33±9 W.u.) among the 21+ states of even nuclei in the 1f 7 2 shell. © 1973.
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