List of levels for 196PO

Author: Huang Xiaolong | Citation: Nucl. Data Sheets 108, 1093 (2007) | Cutoff date: 1-Jan-2006

Data for the excited states are from ¹⁶⁰Dy(⁴⁰Ar,4nγ) study (1991Al15). Data for ground state are from its α decay.

Δ<r²>, monopole strength are available, see 1989De18.

Nuclear structure calculations: 1977Ma14, 1988Sa37, 1991Sa12, 1997Ci07.

Cross section and yield measurements: 1982LeZN, 1982Si11, 1984Da14.

α-decay calculation: 1979Po23, 1988Hu03.

Q-value: Note: Current evaluation has used the following Q record -9551 6110471 412740 146657 3 2003Au03

E(level): From least-squares fit to Eγ’s.

J^π(level): From γγ(θ) of oriented nuclei in (HI,xnγ) (1995Be31), except as noted.

T_1/2(level): From time-difference spectra.

E(γ): From (HI,xnγ) (1995Be31,1999Ta03)

I(γ): Relative branching intensity from each level in (HI,xnγ).

M(γ): From DCO ratios and approximate values of total conversion coefficients.

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	Multipolarity	Conversion Coefficient	Additional Data
463.12	2+		463.09 9	E2	0.0387	α=0.0387, α(K)=0.0260 4, α(L)=0.00954 14, α(M)=0.00241 4, α(N+)=0.000756 11
859.05	2+	< 12 ns	395.82 12	[M1+E2]	0.15	B(E2)(W.u.)>0.0066, B(M1)(W.u.)>2.7E-6, α=0.15 9, α(K)=0.11 8, α(L)=0.025 9, α(M)=0.0060 19, α(N+)=0.0019 7
859.05	2+	< 12 ns	859.2 2	E2	0.0099	B(E2)(W.u.)>0.00085, α=0.0099 1, α(K)=0.00769 11, α(L)=0.001685 24, α(M)=0.000408 6, α(N+)=0.0001289 18
890.99	4+		427.89 9	E2	0.0472	α=0.0472, α(K)=0.0307 5, α(L)=0.01236 18, α(M)=0.00314 5, α(N+)=0.000983 14
1387.75	4+		496.74 10	[M1+E2]	0.08	α=0.08 5, α(K)=0.06 5, α(L)=0.013 6, α(M)=0.0031 12, α(N+)=0.0010 4
1387.75	4+		528.61 11	E2	0.0282	α=0.0282, α(K)=0.0198 3, α(L)=0.00631 9, α(M)=0.001579 23, α(N+)=0.000496 7
1390.10	6+		499.11 10	E2	0.0323	α=0.0323, α(K)=0.0223 4, α(L)=0.00755 11, α(M)=0.00190 3, α(N+)=0.000595 9
1802.04	5-		414.24 8	E1	0.0152	α=0.0152 8, α(K)=0.01254 18, α(L)=0.00210 3, α(M)=0.000492 7, α(N+)=0.0001547 22
1802.04	5-		911.5 3	[E1]	0.00321	α=0.00321, α(K)=0.00267 4, α(L)=0.000417 6, α(M)=9.68×10^-5 14, α(N+)=3.06E-5 5
1940.34	8+		550.29 11	E2	0.0256	α=0.0256, α(K)=0.0182 3, α(L)=0.00559 8, α(M)=0.001395 20, α(N+)=0.000438 7
1974.25	8+		583.9 2	E2	0.0225	α=0.0225, α(K)=0.01622 23, α(L)=0.00471 7, α(M)=0.001171 17, α(N+)=0.000368 6
2039.32	7-		237.28 9	E2	0.263	α=0.263, α(K)=0.1138 16, α(L)=0.1110 16, α(M)=0.0292 5, α(N+)=0.00906 13
2292.75	9-		253.45 10	E2	0.212	α=0.212, α(K)=0.0978 15, α(L)=0.0847 13, α(M)=0.0222 4, α(N+)=0.00690 11
2493.9	11-	856 ns 17	552	E3	0.0809	B(E3)(W.u.)=37 4, α=0.0809, α(K)=0.0444 7, α(L)=0.0272 4, α(M)=0.00710 10, α(N+)=0.00223 4
2591.39	10+		616.9 2	E2	0.0198	α=0.0198, α(K)=0.01452 21, α(L)=0.00402 6, α(M)=0.000994 14, α(N+)=0.000313 5
2778.50	(10+)		485.79 10	(E1)	0.0109	α=0.0109, α(K)=0.00897 13, α(L)=0.001477 21, α(M)=0.000345 5, α(N+)=0.0001088 16
2979.0	11(-)		387.64 12	(E1)	0.0176	α=0.0176, α(K)=0.01440 21, α(L)=0.00243 4, α(M)=0.000569 9, α(N+)=0.000179 3
3343.8	(12+)		565.3 2	E2	0.0241	α=0.0241, α(K)=0.01726 25, α(L)=0.00516 8, α(M)=0.001286 18, α(N+)=0.000404 6
3646.7	13(-)		667.7 2	E2	0.0170	α=0.0170, α(K)=0.01243 18, α(L)=0.00322 5, α(M)=0.000794 12, α(N+)=0.000250 4

Q(β-)=-9.57×10³ keV 4	S(n)= 1.049×10⁴ keV 4	S(p)= 2746 keV 14	Q(α)= 6658.0 keV 25
Reference: 2012WA38

References:
A	(HI,xnγ)	B	¹⁹⁶Po IT decay (856 NS)
C	²⁰⁰Rn α decay (0.96 S)

E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
0.0	A B C	0+	5.8 s 2 % ε ≈ 2 % α ≈ 98
463.12 9	A B C	2+		463.09 9	100	E2	0.0	0+
558 7	C	0+
859.05 11	A B	2+	< 12 ns	395.82 12 859.2 2	64 2 100 3	[M1+E2] E2	463.12 0.0	2+ 0+
890.99 12	A B	4+		427.89 9	100 2	E2	463.12	2+
1387.75 13	A B	4+		496.74 10 528.61 11 925.4	100 2 82 3	[M1+E2] E2	890.99 859.05 463.12	4+ 2+ 2+
1390.10 15	A B	6+		499.11 10	100	E2	890.99	4+
1525.1 5	A B			669.5	100		859.05	2+
1802.04 15	A B	5-		277.8 5 414.24 8 911.5 3	25 7 100 2 45 1	E1 [E1]	1525.1 1387.75 890.99	4+ 4+
1907.3 4	A B			516.1 517.6 4	100 33		1387.75 1390.10	4+ 6+
1940.34 19	A B	8+		550.29 11	100	E2	1390.10	6+
1974.25 23	A	8+		583.9 2	100	E2	1390.10	6+
2039.32 17	A B	7-		133.8 237.28 9 649	100	E2	1907.3 1802.04 1390.10	5- 6+
2292.75 20	A B	9-		253.45 10	100	E2	2039.32	7-
2304.5 9	A B			265	100		2039.32	7-
2493.9 4	A B	11-	856 ns 17	198 552	100	E3	2292.75 1940.34	9- 8+
2591.39 24	A	10+		616.9 2 651.3 2	100 2 16 2	E2	1974.25 1940.34	8+ 8+
2650.6 9	A			346 358			2304.5 2292.75	9-
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
2778.50 22	A	(10+)		283.8 4 485.79 10	79 21 100 2	(E1)	2493.9 2292.75	11- 9-
2979.0 3	A	11(-)		387.64 12	100	(E1)	2591.39	10+
3083.6 13	A			433	100		2650.6
3343.8 3	A	(12+)		565.3 2	100	E2	2778.50	(10+)
3609.6 17	A			526	100		3083.6
3646.7 4	A	13(-)		667.7 2	100	E2	2979.0	11(-)

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	0+	5.8 s 2 % ε ≈ 2 % α ≈ 98	From systematics of β-strength function (1973Ta30). Other: %α=94 5, α reduced width: 73 keV 5, Eα=6521 keV 5 (1993Wa04). E(level): From systematics of β-strength function (1973Ta30). Other: %α=94 5, α reduced width: 73 keV 5, Eα=6521 keV 5 (1993Wa04). K^π=0⁺ GROUND-STATE band.
463.12	2+		E(level): K^π=0⁺ GROUND-STATE band.
890.99	4+		E(level): K^π=0⁺ GROUND-STATE band.
1390.10	6+		E(level): K^π=0⁺ GROUND-STATE band.
1802.04	5-		E(level): NEGATIVE-PARITY COLLECTIVE ROTATIONAL band.
1940.34	8+		E(level): K^π=0⁺ GROUND-STATE band.
2039.32	7-		E(level): NEGATIVE-PARITY COLLECTIVE ROTATIONAL band.
2292.75	9-		E(level): NEGATIVE-PARITY COLLECTIVE ROTATIONAL band.
2493.9	11-	856 ns 17	E(level): NEGATIVE-PARITY COLLECTIVE ROTATIONAL band.