List of levels for 74RB

Authors: Balraj Singh, Ameenah R. Farhan | Citation: Nucl. Data Sheets 107, 1923 (2006) | Cutoff date: 30-Apr-2006

⁷⁴Rb isotope produced in the following reactions followed by mass-separation: 1975BoYS: ⁵⁰Cr(³²S,3p5n); 1977Da04,1979Ep01: spallation reaction using Nb(p,X) and La(p,X) reactions; 1996Jo17,2001Oi04,2002Oi02: ⁹³Nb(p,X) E=1 GeV; 1998Lo17: ⁹²Mo beam fragmentation; 1999Lo07,2001Ga24: Ni(⁹²Mo,X); 2001Ba12,2002Do08,2002Zg01: Nb(p,X)

Other reactions:

1991Ba01, 1989Le12: ⁵⁸Ni(¹⁶O,p)(¹⁶O,π⁺)(¹⁶O,π^-) E=94 MeV/nucleon, measured cross section and model calculations.

Mass measurements: 2004Ke14, 2004Ke10, 2002He23, 1982Au01, 1979Ep01

α novel method is in progress at JYFL (see JYFL Accelerator News volume 14, No. 1, February 2006) to study level structure of ⁷⁴Rb through β-decay tagging method in reaction where Ca target is bombarded with a ³⁶Ar beam at energies just above the Coulomb barrier. Results of this study are not yet available but the 6⁺ and 8⁺ members of the g.s. (t=1) band may have been identified in this study according to an e-mail reply (March 20, 2006) from one of the researchers of this study.

Q-value: Note: Current evaluation has used the following Q record -11220 syst 13940 syst 2654 8 -2920 syst 2003Au03

Q-value: Δ(Q(β^-))=500, Δ(S(n))=150, Δ(Q(α))=310 (2003Au03)

Q-value: Q(εp decay)=4420 50 (2003Au03)

J^π(level): As proposed in ⁴⁰Ca(⁴⁰Ca,αpnγ) (2003Ol02) levels above g.s. The assignments are based on γγ(θ)(DCO) for selected γ rays, and band associations. Parentheses are added by the evaluators

M(γ): From γγ(θ)(DCO). Mult=Q indicates ΔJ=2, mult=d indicates ΔJ=1 transition

Q(β-)=-1.109×10⁴ keV SY	S(n)= 1.391×10⁴ keV SY	S(p)= 2653 keV 8	Q(α)= -2915 keV 16
Reference: 2012WA38

E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	M(γ)	Final Levels
0.0	A	0+	64.776 ms 30 % ε = 100
478	A	(2+)		478		0.0	0+
1006	A	(3+)		528	D	478	(2+)
1053	A	(4+)		575	Q	478	(2+)
1225	A	(4+)		219	D	1006	(3+)
1489	A	(5+)		265 483	D Q	1225 1006	(4+) (3+)
1546	A	(6+)		493	Q	1053	(4+)
1793	A	(7+)		304	Q	1489	(5+)
1806	A	(6+)		581	Q	1225	(4+)
2241	A	(8+)		695	Q	1546	(6+)
2313	A	(9+)		520		1793	(7+)
2972?	A			731?		2241	(8+)
3126	A	(10+)		885		2241	(8+)
3137	A	(11+)		824		2313	(9+)
4091	A	(13+)		954		3137	(11+)
4177	A	(12+)		1051		3126	(10+)
5216	A	(15+)		1125	Q	4091	(13+)
5360	A	(14+)		1183		4177	(12+)
6517	A	(17+)		1301		5216	(15+)
6686	A	(16+)		1326		5360	(14+)
8006	A	(19+)		1489		6517	(17+)
8193	A	(18+)		1507		6686	(16+)
9654	A	(21+)		1648		8006	(19+)
9881	A	(20+)		1688		8193	(18+)
11411	A	(23+)		1757		9654	(21+)
11701?	A	(22+)		1820?		9881	(20+)
13376	A	(25+)		1965		11411	(23+)
15699	A	(27+)		2323		13376	(25+)
E(level) (keV)	XREF	J^π(level)	T_1/2(level)	E(γ) (keV)	M(γ)	Final Levels
18478	A	(29+)		2779		15699	(27+)
21612	A	(31+)		3134		18478	(29+)

E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	M(γ)	Final Levels
Band 1 - T=1 band, GS band.
0.0	0+	64.776 ms 30 % ε = 100
478	(2+)		478		0.0	0+
1053	(4+)		575	Q	478	(2+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	M(γ)	Final Levels
Band 2 - T=0 band, π3/2[312]ν3/2[312], Kπ=3⁺
1006	(3+)
1225	(4+)		219	D	1006	(3+)
1489	(5+)		265 483	D Q	1225 1006	(4+) (3+)
1806	(6+)		581	Q	1225	(4+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	M(γ)	Final Levels
Band 3 - T=0 band, BASED ON 6⁺, πg_9/2~#νg_9/2
1546	(6+)
2241	(8+)		695	Q	1546	(6+)
3126	(10+)		885		2241	(8+)
4177	(12+)		1051		3126	(10+)
5360	(14+)		1183		4177	(12+)
6686	(16+)		1326		5360	(14+)
8193	(18+)		1507		6686	(16+)
9881	(20+)		1688		8193	(18+)
11701	(22+)		1820?		9881	(20+)
E(level) (keV)	J^π(level)	T_1/2(level)	E(γ)	M(γ)	Final Levels
Band 4 - T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2
1793	(7+)
2313	(9+)		520		1793	(7+)
3137	(11+)		824		2313	(9+)
4091	(13+)		954		3137	(11+)
5216	(15+)		1125	Q	4091	(13+)
6517	(17+)		1301		5216	(15+)
8006	(19+)		1489		6517	(17+)
9654	(21+)		1648		8006	(19+)
11411	(23+)		1757		9654	(21+)
13376	(25+)		1965		11411	(23+)
15699	(27+)		2323		13376	(25+)
18478	(29+)		2779		15699	(27+)
21612	(31+)		3134		18478	(29+)

E(level)	J^π(level)	T_1/2(level)	Comments
0.0	0+	64.776 ms 30 % ε = 100	E(level): T=1 band, GS band.
478	(2+)		E(level): T=1 band, GS band.
1006	(3+)		E(level): T=0 band, π3/2[312]ν3/2[312], Kπ=3⁺.
1053	(4+)		E(level): T=1 band, GS band.
1225	(4+)		E(level): T=0 band, π3/2[312]ν3/2[312], Kπ=3⁺.
1489	(5+)		E(level): T=0 band, π3/2[312]ν3/2[312], Kπ=3⁺.
1546	(6+)		E(level): T=0 band, BASED ON 6⁺, πg_9/2~#νg_9/2.
1793	(7+)		E(level): T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2.
1806	(6+)		E(level): T=0 band, π3/2[312]ν3/2[312], Kπ=3⁺.
2241	(8+)		E(level): T=0 band, BASED ON 6⁺, πg_9/2~#νg_9/2.
2313	(9+)		E(level): T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2.
3126	(10+)		E(level): T=0 band, BASED ON 6⁺, πg_9/2~#νg_9/2.
3137	(11+)		E(level): T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2.
4091	(13+)		E(level): T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2.
4177	(12+)		E(level): T=0 band, BASED ON 6⁺, πg_9/2~#νg_9/2.
5216	(15+)		E(level): T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2.
5360	(14+)		E(level): T=0 band, BASED ON 6⁺, πg_9/2~#νg_9/2.
6517	(17+)		E(level): T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2.
6686	(16+)		E(level): T=0 band, BASED ON 6⁺, πg_9/2~#νg_9/2.
8006	(19+)		E(level): T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2.
8193	(18+)		E(level): T=0 band, BASED ON 6⁺, πg_9/2~#νg_9/2.
9654	(21+)		E(level): T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2.
9881	(20+)		E(level): T=0 band, BASED ON 6⁺, πg_9/2~#νg_9/2.
11411	(23+)		E(level): T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2.
11701	(22+)		E(level): T=0 band, BASED ON 6⁺, πg_9/2~#νg_9/2.
E(level)	J^π(level)	T_1/2(level)	Comments
13376	(25+)		E(level): T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2.
15699	(27+)		E(level): T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2.
18478	(29+)		E(level): T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2.
21612	(31+)		E(level): T=0 band, BASED ON 7(+), πg_9/2~#νg_9/2.