Gamma-Gamma Angular Correlation in ¹⁴⁷Pm

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Angular correlation studies have been carried out for seven cascades viz. 275–410, 275–319, 596–91, 440–91, 398–91, 319–91 and 197–398 keV in ¹⁴⁷Pm. Out of these 275–410 keV cascade has been attempted for the first time. A spin assignment of 5/2⁺ has been confirmed for the 490 keV level. The mixing ratios of 596, 440, 410, 398, 319 and 197 keV gamma rays were found to be M1+(19₋₄⁺⁶)% E2, M1+(25₋₃⁺⁴)% E2, E2+3.8% M3, M1+(5±1.5)% E2, M1+(1.5_−1.5^+1.0)% E2 and M1+(82±4)% E2, respectively. The experimental transition probabilities for the 596, 440, 275, 197 and 91 keV gamma rays have been calculated and comparison made with the single particle estimates.