List of levels for 251MD

ADOPTED LEVELS, GAMMAS for ²⁵¹Md

Authors: E. Browne, J. K. Tuli | Citation: Nucl. Data Sheets 114, 1041 (2013) | Cutoff date: 1-Jan-2012

Full ENSDF file | Adopted Levels (PDF version)

Q(β-)=-3884 keV SY	S(n)= 7736 keV SY	S(p)= 2396 keV 21	Q(α)= 7963 keV 5
Reference: 2012WA38

References:
A	²⁵⁵Lr α decay (31.1 S)	B	²⁵⁵Lr α decay (2.54 S)
C	²⁰⁵Tl(⁴⁸Ca,2nγ)

Calculations, compilation:

Favored α decay: 1993Bu09

Ground state properties: 1997Mo25, 1995Mo29, 2002Lo05, 2001Mo07, 2004Pa40

Single-particle Nilsson levels: 1994Cw02, 2003Be41, 2004Pa40, 2009He02, 2009Ke02

Q(α), T_1/2: 2012Po01, 2010Si27, 2010Ad19, 2009Do22, 2008Do12.

1994Cw02 calculated the following single-particle level sequence: g.s. 1/2[521], 0.30 MeV 7/2[514], 0.43 MeV 7/2[633], 0.63 MeV 9/2[624], 0.82 MeV 3/2[521]

Assignment: ²⁴³Am(¹³C,5n), ²⁴³Am(¹²C,4n) (1973Es01).

Q-value: Estimated: ΔQ(β^-)=116, ΔS(n)=302 (2012Wa38).

E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	Final Levels
0	A B C	(7/2-)	4.0 m 5 % ε ≥ 90 % α ≤ 10
≈55	A C	(1/2-)
95 Calc.	C	(5/2-)		40 Calc. S	100	55	(1/2-)
≈135	A B	(11/2-)
188 Calc.	C	(9/2-)		93 Calc. S	100	95	(5/2-)
335 Calc.	C	(13/2-)		147 Calc. S	100	188	(9/2-)
530.4 3	C	(17/2-)		195.4 3	100	335	(13/2-)
775.3 4	C	(21/2-)		244.9 2	100	530.4	(17/2-)
1067.0 4	C	(25/2-)		291.7 2	100	775.3	(21/2-)
1403.1 5	C	(29/2-)		336.1 2	100	1067.0	(25/2-)
1779.9 5	C	(33/2-)		376.8 2	100	1403.1	(29/2-)
2195.0 6	C	(37/2-)		415.1 4	100	1779.9	(33/2-)
2644.8 10	C	(41/2-)		449.8 8	100	2195.0	(37/2-)
3127.8 14	C	(45/2-)		483 1	100	2644.8	(41/2-)

E(level): From ²⁵⁵Lr α decay, unless otherwise noted.

J^π(level): Based on rotational structure.

E(γ): From ²⁰⁵Tl(⁴⁸Ca,2nγ)

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	I(γ)	Final Levels
Band 1 - 1/2[521] ROTATIONAL band, α=+1/2
≈55	(1/2-)
95 Calc.	(5/2-)
188 Calc.	(9/2-)		93 Calc. S	100	95	(5/2-)
335 Calc.	(13/2-)
530.4 3	(17/2-)		195.4 3	100	335	(13/2-)
775.3 4	(21/2-)		244.9 2	100	530.4	(17/2-)
1067.0 4	(25/2-)		291.7 2	100	775.3	(21/2-)
1403.1 5	(29/2-)		336.1 2	100	1067.0	(25/2-)
1779.9 5	(33/2-)		376.8 2	100	1403.1	(29/2-)
2195.0 6	(37/2-)		415.1 4	100	1779.9	(33/2-)
2644.8 10	(41/2-)		449.8 8	100	2195.0	(37/2-)
3127.8 14	(45/2-)		483 1	100	2644.8	(41/2-)

E(level)	J^π(level)	T_1/2(level)	Comments
0	(7/2-)	4.0 m 5 % ε ≥ 90 % α ≤ 10	Calculated T_1/2(SF)≈10 y (1985Lo17).
55	(1/2-)		E(level): 1/2[521] ROTATIONAL band, α=+1/2.
95	(5/2-)		E(level): 1/2[521] ROTATIONAL band, α=+1/2. From ²⁰⁵Tl(⁴⁸Ca,2nγ), based on fixed value of 335 keV for 13/2- level.
188	(9/2-)		E(level): 1/2[521] ROTATIONAL band, α=+1/2. From ²⁰⁵Tl(⁴⁸Ca,2nγ), based on fixed value of 335 keV for 13/2- level.
335	(13/2-)		E(level): 1/2[521] ROTATIONAL band, α=+1/2. From ²⁰⁵Tl(⁴⁸Ca,2nγ), based on fixed value of 335 keV for 13/2- level.
530.4	(17/2-)		E(level): 1/2[521] ROTATIONAL band, α=+1/2. From ²⁰⁵Tl(⁴⁸Ca,2nγ), based on fixed value of 335 keV for 13/2- level.
775.3	(21/2-)		E(level): 1/2[521] ROTATIONAL band, α=+1/2. From ²⁰⁵Tl(⁴⁸Ca,2nγ), based on fixed value of 335 keV for 13/2- level.
1067.0	(25/2-)		E(level): 1/2[521] ROTATIONAL band, α=+1/2. From ²⁰⁵Tl(⁴⁸Ca,2nγ), based on fixed value of 335 keV for 13/2- level.
1403.1	(29/2-)		E(level): 1/2[521] ROTATIONAL band, α=+1/2. From ²⁰⁵Tl(⁴⁸Ca,2nγ), based on fixed value of 335 keV for 13/2- level.
1779.9	(33/2-)		E(level): 1/2[521] ROTATIONAL band, α=+1/2. From ²⁰⁵Tl(⁴⁸Ca,2nγ), based on fixed value of 335 keV for 13/2- level.
2195.0	(37/2-)		E(level): 1/2[521] ROTATIONAL band, α=+1/2. From ²⁰⁵Tl(⁴⁸Ca,2nγ), based on fixed value of 335 keV for 13/2- level.
2644.8	(41/2-)		E(level): 1/2[521] ROTATIONAL band, α=+1/2. From ²⁰⁵Tl(⁴⁸Ca,2nγ), based on fixed value of 335 keV for 13/2- level.
3127.8	(45/2-)		E(level): 1/2[521] ROTATIONAL band, α=+1/2. From ²⁰⁵Tl(⁴⁸Ca,2nγ), based on fixed value of 335 keV for 13/2- level.