Energy levels in 197Tl populated in the Tl reaction

Band structures and intruderπi13/2state in197Tl

“…The spins and the parities of the states were deduced in the previous work from the multipolarities of the γ rays of 197 Tl, determined from the angular distribution measurements [4,18] and also from the measured conversion electron spectra [4].…”

“…In one of the previous experiments [18], the J π of the 1953-and 1867-keV levels were assigned as 9/2 − and 9/2, respectively. In the present work the 958-keV γ ray from the 1953-keV level to the 995-keV level has been found to be of E1 type from the DCO and polarization measurements.…”

Band structures and intruder $π$$i_{13/2}$ state in $^{197}$Tl

“…(Err) (Err) polarity 102.6(1) 3169.5 27/2 − 2.4(3) 1.90(34) [2] -M1+E2 107.2(3) 3276.7 29/2 − 1.1(2) 1.41(34) [2] -M1+E2 152.4(1) 2266.1 17/2 − 6.8(7) 1.67(34) [3] -M1(+E2) 171.1(1) 2596.6 21/2 − 6.9(6) 1.51( 17) [4] -M1+E2 179.3(1) 2555.0 19/2 (−) 4.0(4) 1.00( 21) [5] -(M1+E2) 192.2(2) 3760.1 27/2 − 2.0(2) 1.16(18) [5] -M1+E2 195.9(1) 2461.7 19/2 − 5.1(3) 1.08( 12) [5] -M1+E2 204.6(3) 3964.7 29/2 − 1.8(2) 1.12(16) [5] -M1+E2 206.6(2) 3066.9 25/2 − 6.2(7) 1.33(18) [4] -M1+E2 222.6(1) 608.1 9/2 − 29.0(20) --E3 [6] 241.2(1) 2796.1 21/2 (−) 6.8(9) 1.03(15) [5] -(M1+E2) 261.9(1) 2375.7 17/2 (−) 7.3(9) 1.15(16) [7] -(M1+E2) 263.2(1) 2529.3 19/2 − 5.1(6) 0.89(8) [8] -M1+E2 263.8(1) 2860.3 23/2 − 8.4(8) 1.51(19) [9] -0.05(2) M1+E2 267.4(1) 3063.6 23/2 (−) 6.5(6) 1.01(6) [5] -(M1+E2) 289.0(1) 3352.6 25/2 (−) 6.5(6) 0.99(15) [5] -(M1+E2) 298.7(3) 2018.1 17/2 − 2.3(2) 1.52(25) [4] -0.19(9) M1+E2 307.8(2) 1303.2 13/2 − 18.2(15) 1.50(15) [9] -0.07(2) M1+E2 319.6(1) 3672.2 27/2 (−) 6.2(6) 1.00( 12) [5] -(M1+E2) 320. 6(3) 2040.0 17/2 − 4.0(3) 1.34( 18) [4] -0.13(5) M1+E2 339.1(2) 2800.8 21/2 − 4.6(4) 1.09(11) [5] -0.25(7) M1(+E2) 345.8(2) 3146.7 23/2 − 1.8(2) 1.15(11) [5] -0.27 ( Iγ [1] RDCO ∆P DCO Multi-(keV) (keV) (Err) (Err) polarity 360.8(1) 4033.0 29/2 (−) 3.5(5) 1.03(29) [5] -(M1+E2) 385.2(1) 2425.5 19/2 − 3.7(5) 1.78(17) [10] -0.27(9) M1+E2 385.5(1) 385.5 3/2 + 100(5) --M1+E2 [6] 387.3(1) 995.4 11/2 − 64.0(60) 1.39(12) [9] -0.09(2) M1+E2 407.7(2) 2425.5 19/2 − 5.0(4) 1.56(15) [9] -0.08(3) M1+E2 416.5(2) 1719.3 15/2 − 31.0(40) 1.86( 16) …”

“…[1] Relative γ ray intensities are estimated from singles measurement and normalized to 100 for the total intensity of 385.5 keV γ rays. [2] From 706.6 keV (E2) DCO gate; [3] From 767.1 keV (E2) DCO gate; [4] From 723.9 keV (E2) DCO gate; [5] From 560.9 keV (E1) DCO gate; [6] From ref. [4]; [7] From 241.2 keV (M1+E2) DCO gate; [8] From 152.4 keV (M1(+E2)) DCO gate; [9] From 714.8 keV (E2) DCO gate; [10] From 695.4 keV (E2) DCO gate; [11] From 387.3 keV (M1+E2) DCO gate; Gated spectra were used to obtain the relative intensity of the 385.2-keV transition as well.…”

Identification of intruderπi13/2state in197Tl

“…With these new assignments, the band B2 becomes a negative parity band which was earlier assigned as a positive parity one. Moreover, the J π of the 1953-and 1867-keV states have also been modified from the previous assignments [3] based on the preliminary assignment of multipolarity and transition type for the 958-and 871-keV γ rays. Out of the two 13/2 + states at 1553 keV and 1953 keV, observed in our work, the former one has been proposed to be the candidate for the intruder πi 13/2 configuration due to its strong decay to the 11/2 − state of the πh 9/2 band similar to those observed for the lighter isotopes [1,8].…”