List of levels for 27NA

Author: M. Shamsuzzoha Basunia | Citation: Nucl. Data Sheets 112, 1875 (2011) | Cutoff date: 30-Nov-2010

Some recent nuclear structure calculations: 2006Ko02, 2004Ge02, 2004La24.

2010Ro23: Measured one-neutron knock out cross section for 39 neutron rich isotopes, ranging from carbon to aluminium and with neutron numbers from 8 to 22. For ²⁷Ne, the measured one-neutron knock out cross section is 64(8) mb on a beryllium target.

²⁷Na matter radii: 2.95 fm 4 (1998Su07); ²⁷Na charge radii: 3.01 fm 5 (2004An14).

Production cross section |J0.1 μb and |J0.5 μb, measured in ⁴⁰Ar fragmentation through ⁹Be(⁴⁰Ar,X), E=90α MeV, and ¹⁸¹Ta(⁴⁰Ar,X), E=94α MeV, reactions, respectively - 2007No13.

In 2006Kh08, 57.92 MeV/u and 50.65 MeV/u beams of ²⁷Na impinged on a Si target, measured σ=2099 (86) mb and σ=2192 (31) mb, respectively, for the Si(²⁷Na,x) reaction and a squared reduced absorption radius of r₀²=1.172 (16) fm² is deduced and used to study the isospin dependence.

g-factor measurement: 1.557 3 (2001Ne03), 1.558 2 (1978Hu12).

Q-value: Note: Current evaluation has used the following Q record 9068 4 6728 5 13286 19-112.5×10²¹⁰ 2011AuZZ

Q-value: S(p)=13240 30, Q(α)=-11270 80 2003Au03

E(level): From a least-square fit to γ-ray energies, assuming ΔE=1 keV for all γ-rays.

J^π(level): Jπ between brackets are assigned mainly from a comparison of shell model level energies with experimental levels (2002Co11 - (¹⁴C,pγ)).

M(γ): From angular distribution measurement ((¹⁴C,pγ)-2002Co11).

Q(β-)=9069 keV 4	S(n)= 6728 keV 6	S(p)= 13286 keV 19	Q(α)= -1.126×10⁴ keV 5
Reference: 2012WA38

References:
A	²⁷Ne β^- decay	B	²⁸Ne β^-n decay
C	²⁹Ne β^-2n decay	D	²H(²⁶Ne,nγ)
E	¹⁴C(¹⁴C,pγ)	F	²⁶Mg(¹⁸O,¹⁷F)

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 D E F	5/2+	301 ms 6 % β^- = 100 % β^-n = 0.13 4
62.9 6	A B C D E	(3/2+)		63	100	(M1+E2)	0.0	5/2+
1728.0 8	A D E F	(1/2+)		1665 1728	100 17 14 7		62.9 0.0	(3/2+) 5/2+
1815.7 9	E	[1/2+]		1753	100		62.9	(3/2+)
2191.8 10	A E F	(7/2+)		2129	100	(E2)	62.9	(3/2+)
2224.2 9	E	(9/2+)		2224	100	(E2)	0.0	5/2+
2287.9 12	A			2225	100		62.9	(3/2+)
2729.1 10	E	[5/2+]		2729	100		0.0	5/2+
2799.1 8	A			2736 2799	100 14 51 8		62.9 0.0	(3/2+) 5/2+
3019.1 8	A E	[3/2+]		2956 3019	32 6 100 11		62.9 0.0	(3/2+) 5/2+
3508.2 10	A			3508	100		0.0	5/2+
3582.3 10	A			3582	100		0.0	5/2+
3638.3 10	E			3638	100		0.0	5/2+
3657.2 13	E	[9/2+]		1433	100		2224.2	(9/2+)
3685.3 10	A			3685	100		0.0	5/2+
3781.3 10	A F			3781	100		0.0	5/2+
3837.8 14	E	[5/2+]		1646	100		2191.8	(7/2+)
4235.4 9	E	[7/2+]		4235	100		0.0	5/2+
4355.0 16	A			2067	100		2287.9
4525.4 10	E			4525	100		0.0	5/2+
4716.7 9	E	[3/2+]		2901 4716	35 100		1815.7 0.0	[1/2+] 5/2+
4980 50	F
5190.4 13	E	[13/2+]		2966	100		2224.2	(9/2+)
5408.9 10	E	[11/2+]		3217	100		2191.8	(7/2+)
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	I(γ)	M(γ)	Final Levels
5590 50	F
5704.6 8	E	[11/2+]		1469 3480	61 100		4235.4 2224.2	[7/2+] (9/2+)
5762.7 10	E			5762	100		0.0	5/2+
5948.0 12	E	[9/2+]		539	100		5408.9	[11/2+]
6158.7 8	E	[9/2+]		454 750 6158	100 50 50		5704.6 5408.9 0.0	[11/2+] [11/2+] 5/2+
6518.4 15	E	[5/2+]		3789	100		2729.1	[5/2+]
6742.1 12	E	[7/2+,9/2,11/2+]		794 4550	79 100		5948.0 2191.8	[9/2+] (7/2+)
9186.7 17	E	[17/2+]		3996	100		5190.4	[13/2+]

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	5/2+	301 ms 6 % β^- = 100 % β^-n = 0.13 4	Q=-0.007 3, μ=+3.895 5 E(level): g.s. band.
2224.2	(9/2+)		E(level): g.s. band.
2729.1	[5/2+]		E(level): Depopulating γ-ray from this level has been shown to feed the g.s. in the decay scheme (¹⁴C,pγ). If the γ-ray feeds the 62.9 keV state, then the energy of the state would be 62.9 keV higher, indicated in 2002Co11.
5190.4	[13/2+]		E(level): g.s. band.
6518.4	[5/2+]		E(level): Depopulating γ-ray from this level has been shown to feed the g.s. in the decay scheme (¹⁴C,pγ). If the γ-ray feeds the 62.9 keV state, then the energy of the state would be 62.9 keV higher, indicated in 2002Co11.
9186.7	[17/2+]		E(level): g.s. band.