List of levels for 225TH

Authors: A. K. Jain , R. Raut , J. K. Tuli | Citation: Nucl. Data Sheets 110, 1409 (2009) | Cutoff date: 1-Dec-2008

Theoretical calculations in 2007Mi30, 2002Ts01, 1995De13, 1993De18, 1991Cw01, 1989Cw03.

Detailed spectroscopic studies on ²²⁵Th was carried out using the reaction ²²⁶Ra(α,5n) at a beam energy of 50 MeV. The measurements could establish the level structure of the nucleus upto an excitation energy of 2494 keV and spin 39/2~h. Parity doublets were observed and classified according to simplex (s) quantum number. The results were compared with theoretical calculations in interpreting the nuclear shape. However, the relative excitation of the s=+i band with respect to the ground state could not be established experimentally (1990Hu04).

The level observed at 102 keV in the α-decay, not observed in 1990Hu04. Interpretations in 1988Le13.

Levels: For given s, π=- has greater effective moment of inertia than π=+. For given π, s=-i has larger effective moment of inertia than s=+i, for rotation frequencies <0.18 Mev. For each s, effective moment of inertia converge at a common value.

Q-value: Note: Current evaluation has used the following Q record -2.0×10³ 7 5757 12 5213 6 6921.4 21 2003Au03

E(level): From 1990Hu04

J^π(level): From 1990Hu04. Deduced under the assumption of stretched transition.

E(γ): Uncertainty in γ-energies is 0.2 keV for strong lines and upto 0.5 keV for weak lines. Lines with intensities around 1.0 has been considered as weak lines in this dataset.

M(γ): Multipolarities from conversion electron measurements, (L1⁺L2)/L3 intensity ratios and (L1⁺L2) conversion coefficients.

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ) (keV)	Multipolarity	Conversion Coefficient	Additional Data
68.4	(7/2+)		68.4	[E2]	68.0	α=68.0
187.0	(11/2+)		118.6	E2	5.36	α=5.36 8
325.6	(13/2-)		138.6 2	E1	0.226	α=0.226 4
370.2	(15/2+)		183.2 2	E2	0.914	α=0.914 14
519.7	(17/2-)		149.4 2	E1	0.189	α=0.189 3
614.3	(19/2+)		94.8 2	E1	0.1351	α=0.1351 21
614.3	(19/2+)		244.1 2	E2	0.327	α=0.327 5
768.7	(21/2-)		154.2 2	E1	0.175	α=0.175 3
910.7	(23/2+)		141.8 2	E1	0.214	α=0.214 3
1072.2	(25/2-)		161.9 2	E1	0.1558	α=0.1558 23
X+103.5	(9/2+)		103.5	E2	9.60	α=9.60 14
X+222.8	(11/2-)		119.3 2	E1	0.323	α=0.323 5
X+271.1	(13/2+)		167.6 2	E2	1.288	α=1.288 19
X+401.6	(15/2-)		131.1 2	E1	0.258	α=0.258 4
X+498.1	(17/2+)		95.9 2	E1	0.1311	α=0.1311 20
X+498.1	(17/2+)		227.0 2	E2	0.419	α=0.419 6
X+636.5	(19/2-)		138.6 2	E1	0.226	α=0.226 4
X+775.6	(21/2+)		138.6 2	E1	0.226	α=0.226 4

Q(β-)=-2.03×10³ keV 8	S(n)= 5755 keV 12	S(p)= 5213 keV 7	Q(α)= 6921.4 keV 22
Reference: 2012WA38

E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
0.0	A B	(3/2+)	8.75 m 4 % ε ≈ 10 % α ≈ 90
68.4	A B	(7/2+)		68.4	100	[E2]	0.0	(3/2+)
187.0	A B	(11/2+)		118.6	100	E2	68.4	(7/2+)
325.6	B	(13/2-)		138.6 2	100	E1	187.0	(11/2+)
370.2	B	(15/2+)		44.9 2 183.2 2		E2	325.6 187.0	(13/2-) (11/2+)
519.7	B	(17/2-)		149.4 2 194.1 2		E1	370.2 325.6	(15/2+) (13/2-)
614.3	B	(19/2+)		94.8 2 244.1 2		E1 E2	519.7 370.2	(17/2-) (15/2+)
768.7	B	(21/2-)		154.2 2 249.0 2		E1	614.3 519.7	(19/2+) (17/2-)
910.7	B	(23/2+)		141.8 2 296.4 2		E1	768.7 614.3	(21/2-) (19/2+)
1072.2	B	(25/2-)		161.9 2 303.5 2		E1	910.7 768.7	(23/2+) (21/2-)
1251.3	B	(27/2+)		178.8 2 340.6 5			1072.2 910.7	(25/2-) (23/2+)
1426.3	B	(29/2-)		174.9 2 354.1 2			1251.3 1072.2	(27/2+) (25/2-)
1631.8	B	(31/2+)		205.4 2 380.5 5			1426.3 1251.3	(29/2-) (27/2+)
1824.5	B	(33/2-)		193.1 2 ? 398.2 5			1631.8 1426.3	(31/2+) (29/2-)
2047.2?	B	(35/2+)		222.7 5 ? 415.4 5 ?			1824.5 1631.8	(33/2-) (31/2+)
2259.1?	B	(37/2-)		211.6 2 ? 434.6 5 ?			2047.2 1824.5	(35/2+) (33/2-)
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
2494.4?	B	(39/2+)		234.9 2 ? 447.2 5 ?			2259.1 2047.2	(37/2-) (35/2+)
X	A B	(5/2+)
X+103.5	A B	(9/2+)		103.5	100	E2	X	(5/2+)
X+222.8	B	(11/2-)		119.3 2	100	E1	X+103.5	(9/2+)
X+271.1	B	(13/2+)		48.1 2 167.6 2		E2	X+222.8 X+103.5	(11/2-) (9/2+)
X+401.6	B	(15/2-)		131.1 2 178.8 2 ?		E1	X+271.1 X+222.8	(13/2+) (11/2-)
X+498.1	B	(17/2+)		95.9 2 227.0 2		E1 E2	X+401.6 X+271.1	(15/2-) (13/2+)
X+636.5	B	(19/2-)		138.6 2 234.9 2		E1	X+498.1 X+401.6	(17/2+) (15/2-)
X+775.6	B	(21/2+)		138.6 2 277.5 2		E1	X+636.5 X+498.1	(19/2-) (17/2+)
X+925.2	B	(23/2-)		149.8 288.7 5			X+775.6 X+636.5	(21/2+) (19/2-)
X+1096	B	(25/2+)		170.3 2 320.4 2			X+925.2 X+775.6	(23/2-) (21/2+)
X+1259.3	B	(27/2-)		163.9 2 334.1 2			X+1096 X+925.2	(25/2+) (23/2-)
X+1454.2?	B	(29/2+)		194.1 2 ? 358.2 5 ?			X+1259.3 X+1096	(27/2-) (25/2+)
X+1626.3?	B	(31/2-)		173.2 2 ? 367.0 2 ?			X+1454.2 X+1259.3	(29/2+) (27/2-)
X+1839.1?	B	(33/2+)		211.6 2 ? 384.9 5 ?			X+1626.3 X+1454.2	(31/2-) (29/2+)
X+2020.1?	B	(35/2-)		393.8 5 ?			X+1626.3	(31/2-)

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 1 - s=-i, π=+ band
0.0	(3/2+)	8.75 m 4 % ε ≈ 10 % α ≈ 90
68.4	(7/2+)		68.4	100	[E2]	0.0	(3/2+)
187.0	(11/2+)		118.6	100	E2	68.4	(7/2+)
370.2	(15/2+)		44.9 2 183.2 2		E2	325.6 187.0	(13/2-) (11/2+)
614.3	(19/2+)		94.8 2 244.1 2		E1 E2	519.7 370.2	(17/2-) (15/2+)
910.7	(23/2+)		141.8 2 296.4 2		E1	768.7 614.3	(21/2-) (19/2+)
1251.3	(27/2+)		178.8 2 340.6 5			1072.2 910.7	(25/2-) (23/2+)
1631.8	(31/2+)		205.4 2 380.5 5			1426.3 1251.3	(29/2-) (27/2+)
2047.2	(35/2+)		222.7 5 ? 415.4 5 ?			1824.5 1631.8	(33/2-) (31/2+)
2494.4	(39/2+)		234.9 2 ? 447.2 5 ?			2259.1 2047.2	(37/2-) (35/2+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 2 - s=-i, π=- band
325.6	(13/2-)
519.7	(17/2-)		149.4 2 194.1 2		E1	370.2 325.6	(15/2+) (13/2-)
768.7	(21/2-)		154.2 2 249.0 2		E1	614.3 519.7	(19/2+) (17/2-)
1072.2	(25/2-)		161.9 2 303.5 2		E1	910.7 768.7	(23/2+) (21/2-)
1426.3	(29/2-)		174.9 2 354.1 2			1251.3 1072.2	(27/2+) (25/2-)
1824.5	(33/2-)		193.1 2 ? 398.2 5			1631.8 1426.3	(31/2+) (29/2-)
2259.1	(37/2-)		211.6 2 ? 434.6 5 ?			2047.2 1824.5	(35/2+) (33/2-)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 3 - s=+i, π=+ band
X	(5/2+)
X+103.5	(9/2+)		103.5	100	E2	X	(5/2+)
X+271.1	(13/2+)		48.1 2 167.6 2		E2	X+222.8 X+103.5	(11/2-) (9/2+)
X+498.1	(17/2+)		95.9 2 227.0 2		E1 E2	X+401.6 X+271.1	(15/2-) (13/2+)
X+775.6	(21/2+)		138.6 2 277.5 2		E1	X+636.5 X+498.1	(19/2-) (17/2+)
X+1096	(25/2+)		170.3 2 320.4 2			X+925.2 X+775.6	(23/2-) (21/2+)
X+1454.2	(29/2+)		194.1 2 ? 358.2 5 ?			X+1259.3 X+1096	(27/2-) (25/2+)
X+1839.1	(33/2+)		211.6 2 ? 384.9 5 ?			X+1626.3 X+1454.2	(31/2-) (29/2+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	M(γ)	Final Levels
Band 4 - s=+i, π=- band
X+222.8	(11/2-)
X+401.6	(15/2-)		131.1 2 178.8 2 ?		E1	X+271.1 X+222.8	(13/2+) (11/2-)
X+636.5	(19/2-)		138.6 2 234.9 2		E1	X+498.1 X+401.6	(17/2+) (15/2-)
X+925.2	(23/2-)		149.8 288.7 5			X+775.6 X+636.5	(21/2+) (19/2-)
X+1259.3	(27/2-)		163.9 2 334.1 2			X+1096 X+925.2	(25/2+) (23/2-)
X+1626.3	(31/2-)		173.2 2 ? 367.0 2 ?			X+1454.2 X+1259.3	(29/2+) (27/2-)
X+2020.1	(35/2-)		393.8 5 ?			X+1626.3	(31/2-)

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	(3/2+)	8.75 m 4 % ε ≈ 10 % α ≈ 90	E(level): s=-i, π=+ band.
68.4	(7/2+)		E(level): s=-i, π=+ band.
187.0	(11/2+)		E(level): s=-i, π=+ band.
325.6	(13/2-)		E(level): s=-i, π=- band.
370.2	(15/2+)		E(level): s=-i, π=+ band.
519.7	(17/2-)		E(level): s=-i, π=- band.
614.3	(19/2+)		E(level): s=-i, π=+ band.
768.7	(21/2-)		E(level): s=-i, π=- band.
910.7	(23/2+)		E(level): s=-i, π=+ band.
1072.2	(25/2-)		E(level): s=-i, π=- band.
1251.3	(27/2+)		E(level): s=-i, π=+ band.
1426.3	(29/2-)		E(level): s=-i, π=- band.
1631.8	(31/2+)		E(level): s=-i, π=+ band.
1824.5	(33/2-)		E(level): s=-i, π=- band.
2047.2	(35/2+)		E(level): s=-i, π=+ band.
2259.1	(37/2-)		E(level): s=-i, π=- band.
2494.4	(39/2+)		E(level): s=-i, π=+ band.
X	(5/2+)		E(level): s=+i, π=+ band.
X+103.5	(9/2+)		E(level): s=+i, π=+ band.
X+222.8	(11/2-)		E(level): s=+i, π=- band.
X+271.1	(13/2+)		E(level): s=+i, π=+ band.
X+401.6	(15/2-)		E(level): s=+i, π=- band.
X+498.1	(17/2+)		E(level): s=+i, π=+ band.
X+636.5	(19/2-)		E(level): s=+i, π=- band.
X+775.6	(21/2+)		E(level): s=+i, π=+ band.
E(level)	J^π(level)	T_1/2(level)	Comments
X+925.2	(23/2-)		E(level): s=+i, π=- band.
X+1096	(25/2+)		E(level): s=+i, π=+ band.
X+1259.3	(27/2-)		E(level): s=+i, π=- band.
X+1454.2	(29/2+)		E(level): s=+i, π=+ band.
X+1626.3	(31/2-)		E(level): s=+i, π=- band.
X+1839.1	(33/2+)		E(level): s=+i, π=+ band.
X+2020.1	(35/2-)		E(level): s=+i, π=- band.

E(level)	E(gamma)	Comments
68.4	68.4	E(γ): From the level scheme of 1990Hu04. Not listed in the table. I(γ): Set 100 (β. Singh)
187.0	118.6	I(γ): Set 100 (β. Singh)
325.6	138.6	E(γ): Multiply placed I(γ): Iγ(103 gate)=39 4, Iγ(118 gate)=47 5
370.2	44.9	I(γ): Iγ(103 gate)=3.0 6, Iγ(118 gate)=10 2
370.2	183.2	I(γ): Iγ(103 gate)=6.4 7 Iγ(118 gate)=21
519.7	149.4	I(γ): Iγ(103 gate)=18 2, Iγ(118 gate)=38 4
519.7	194.1	E(γ): Multiply placed I(γ): Iγ(103 gate)=2.1 7, Iγ(118 gate)=3.3 12
614.3	94.8	I(γ): Iγ(103 gate)=11.7 12, Iγ(118 gate)=24 4
614.3	244.1	I(γ): Iγ(103 gate)=3.6 4, Iγ(118 gate)=14.0 14
768.7	154.2	I(γ): Iγ(103 gate)=9.0 9, Iγ(118 gate)=26 3
768.7	249.0	I(γ): Iγ(103 gate)=3.6 4, Iγ(118 gate)=5.9 6
910.7	141.8	I(γ): Iγ(103 gate)=5.0 5, Iγ(118 gate)=14.9 15
910.7	296.4	I(γ): Iγ(103 gate)=≈2, Iγ(118 gate)=6.1 12
1072.2	161.9	I(γ): Iγ(103 gate)=3.8 5, Iγ(118 gate)=12.3 12
1072.2	303.5	I(γ): Iγ(103 gate)=5.3 8, Iγ(118 gate)=8.9 9
1251.3	178.8	E(γ): Multiply placed I(γ): Iγ(103 gate)=2.9 4, Iγ(118 gate)=7.0 7
1251.3	340.6	I(γ): Iγ(103 gate)=0.9 3, Iγ(118 gate)=4.7 7
1426.3	174.9	I(γ): Iγ(103 gate)=4.4 8, Iγ(118 gate)=5.9 6
1426.3	354.1	I(γ): Iγ(103 gate)=1.4 5, Iγ(118 gate)=4.7 5
1631.8	205.4	I(γ): Iγ(103 gate)=5.2 7, Iγ(118 gate)=4.7 10
1631.8	380.5	I(γ): Iγ(103 gate)=0.5 3, Iγ(118 gate)=2.4 4
1824.5	193.1	I(γ): Iγ(103 gate)=8.4 13, Iγ(118 gate)=8.1 12
1824.5	398.2	I(γ): Iγ(103 gate)=1.1 3, Iγ(118 gate)=2.4 4
2047.2	222.7	I(γ): Iγ(103 gate)=0.8 4, Iγ(118 gate)=2.9 6
2047.2	415.4	I(γ): Iγ(103 gate)=1.6 4, Iγ(118 gate)=1.2 3
E(level)	E(gamma)	Comments
2259.1	211.6	E(γ): Multiply placed I(γ): Iγ(103 gate)=2.7 3, Iγ(118 gate)=2.5 3
2259.1	434.6	I(γ): Iγ(103 gate)=1.0 3, Iγ(118 gate)=1.4 3
2494.4	234.9	E(γ): Multiply placed I(γ): Iγ(103 gate)=3.9 4, Iγ(118 gate)=2.4 4
2494.4	447.2	I(γ): Iγ(103 gate)=0.7 2, Iγ(118 gate)=1.2 3
X+103.5	103.5	I(γ): Set 100 (β. Singh)
X+222.8	119.3	I(γ): Iγ(103 gate)=30 3. Set 100 (β. Singh)
X+271.1	48.1	I(γ): Iγ(103 gate)=16 3
X+271.1	167.6	I(γ): Iγ(103 gate)=13 1
X+401.6	131.1	I(γ): Iγ(103 gate)=28 3, Iγ(118 gate)=9.5 10
X+401.6	178.8	E(γ): Multiply placed I(γ): Iγ(103 gate)=2.9 4, Iγ(118 gate)=7.0 7
X+498.1	95.9	I(γ): Iγ(103 gate)=27 3, Iγ(118 gate)=8 3
X+498.1	227.0	I(γ): Iγ(103 gate)=11 2, Iγ(118 gate)=3.4 11
X+636.5	138.6	E(γ): Multiply placed I(γ): Iγ(103 gate)=39 4, Iγ(118 gate)=47 5
X+636.5	234.9	E(γ): Multiply placed I(γ): Iγ(103 gate)=3.9 4, Iγ(118 gate)=2.4 4
X+775.6	138.6	E(γ): Multiply placed I(γ): Iγ(103 gate)=39 4, Iγ(118 gate)=47 5
X+775.6	277.5	I(γ): Iγ(103 gate)=7.1 7, Iγ(118 gate)=2.5 5
X+925.2	288.7	I(γ): Iγ(103 gate)=5.2 5, Iγ(118 gate)=0.8 4
X+1096	170.3	I(γ): Iγ(103 gate)=8.5 9, Iγ(118 gate)=7.8 8
X+1096	320.4	I(γ): Iγ(103 gate)=4.2 6, Iγ(118 gate)=2.1 3
X+1259.3	163.9	I(γ): Iγ(103 gate)=1.9 4, Iγ(118 gate)=2.3 3
X+1259.3	334.1	I(γ): Iγ(103 gate)=3.5 4, Iγ(118 gate)=1.2 3
X+1454.2	194.1	E(γ): Multiply placed I(γ): Iγ(103 gate)=2.1 7, Iγ(118 gate)=3.3 12
X+1454.2	358.2	I(γ): Iγ(103 gate)=1.8 9, Iγ(118 gate)=1.1 4
X+1626.3	173.2	I(γ): Iγ(103 gate)=7.5 10, Iγ(118 gate)=6.7 7
X+1626.3	367.0	I(γ): Iγ(103 gate)=3.8 4, Iγ(118 gate)=2.8 3
E(level)	E(gamma)	Comments
X+1839.1	211.6	E(γ): Multiply placed I(γ): Iγ(103 gate)=2.7 3, Iγ(118 gate)=2.5 3
X+1839.1	384.9	I(γ): Iγ(103 gate)=1.2 3, Iγ(118 gate)=0.9 3
X+2020.1	393.8	I(γ): Iγ(103 gate)=1.3 3, Iγ(118 gate)=0.6 3