ADOPTED LEVELS, GAMMAS for 55Ti

Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 30-Apr-2022 

Author: Balraj Singh |  Citation: ENSDF |  Cutoff date: 30-June-2010 

Author: Huo Junde |  Citation: Nucl. Data Sheets 109, 787 (2008) |  Cutoff date: 30-Apr-2007 

 Full ENSDF file | Adopted Levels (PDF version) 


Q(β-)=7290 keV 40S(n)= 4160 keV 30S(p)= 14680 keV 30Q(α)= -7925 keV 29
Reference: 2021WA16

References:
  A  55Sc β- decay (96 MS)  B  56Sc β-n decay (75 MS)
  C  9Be(48Ca,2pγ)  D  9Be(56Ti,55TiG)

General Comments:

1990Tu01, 1994Se12: mass excess of 55Ti measured in Th(p,F),E=800 MeV, followed by separation of fragments by α/Q using the Time-of-Flight Isochronous (TOFI) spectrometer at the Los Alamos Meson Physics Facility. Deduced mass excess=-41.81 MeV 24 (1994Se12) and -41.59 MeV 26 (1990Tu01) for 55Ti, in agreement with evaluated mass excess of -41832 keV 29 (2021Wa16).

1996Do23: 55Ti produced and identified in 9Be(65Cu,X), E=64.5 MeV/nucleon reaction using LISE3 separator at GANIL facility. Measured γ spectrum, (implants)β and (implants)βγ-correlated events from which half-life of 55Ti decay was extracted.

1998Am04: 55Ti produced in 9Be(86Kr,X),E=500 MeV/nucleon reaction using FRS fragment separator at GSI facility. Measured half-life of 55Ti decay from (implants)(decay events)-correlated decay curve, with a total of 557 implants of 55Ti.

2003Ma56: 55Ti produced in fragmentation of 140-MeV 86Kr34+ beam incident on a 9Be target at NSCL-MSU. The secondary fragments were selected in the A1900 fragment separator, and implanted in a double-sided Si microstrip detector to detect β particles from decay of fragments. Measured Eγ, Iγ, γγ-coin, βγ-coin, half-life of 55Ti decay using SeGA array with six segmented Ge detectors.

Mass measurement: 2018Le03

Theoretical calculations: five primary references (four for structure and one for 55Ti decay) retrieved from the NSR database at www.nndc.bnl.gov/nsr/. These are listed in this dataset under ’document’ records.

Levels: Configurations given in comments are from 2007Zh37 in 9Be(48Ca,2pγ), based on shell-model calculations

Q-value: S(2n)=11094 29, S(2p)=27020 50, Q(β-n)=-10 30 (2021Wa16)









E(level)
(keV)
XREFJπ(level) T1/2(level)E(γ)
(keV)
I(γ)Final Levels
     0.0ABCD (1/2)- 1.3 s 1 
% β- = 100
    
   591.7 3 ABC  (5/2-)      591.7 3 
  100
     0.0
(1/2)-
   955 6    D (3/2)-      955 6 
 
     0.0
(1/2)-
  1795.6 4 ABC  (7/2-)     1203.8 3 
  100
   591.7
(5/2-)
  2145.7 4 A C  (9/2-)      349.6 7 
  1554.1 3 
   22 11 
  100 11 
  1795.6
   591.7
(7/2-)
(5/2-)
  2507.9 5 A    (5/2-,7/2-,9/2-)      712.3 3 
  100
  1795.6
(7/2-)
  2805.7 7   C  (13/2-)      660.0 5 
  100
  2145.7
(9/2-)
  3580.7 9   C  (17/2-)      775.0 5 
  100
  2805.7
(13/2-)
  5461.8 10   C  (19/2-)     1881.0 5 
  100
  3580.7
(17/2-)

E(level): From least-squares fit to Eγ data

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Band Transitions:

E(level)
(keV)
Jπ(level) T1/2(level)E(γ)I(γ)Final Levels
Band 1 - Yrast sequence.
   591.7 3  (5/2-)       
  1795.6 4  (7/2-)     1203.8 3 
  100
   591.7
(5/2-)
  2145.7 4  (9/2-)      349.6 7 
  1554.1 3 
   22 11 
  100 11 
  1795.6
   591.7
(7/2-)
(5/2-)
  2805.7 7  (13/2-)      660.0 5 
  100
  2145.7
(9/2-)
  3580.7 9  (17/2-)      775.0 5 
  100
  2805.7
(13/2-)
  5461.8 10  (19/2-)     1881.0 5 
  100
  3580.7
(17/2-)

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Additional Level Data and Comments:

E(level)Jπ(level)T1/2(level)Comments
     0.0(1/2)- 1.3 s 1 
% β- = 100
Dominant configuration=[π(f7/22)ν(f7/28, p3/24)]0+~#νp1/21 (2007Zh36).
   591.7(5/2-)   Dominant configuration=[π(f7/22)#ν(f7/28,p3/24)] 0+~#νf5/21 (2007Zh36).
Jπ(level): As proposed in 9Be(48Ca,2pγ) (2007Zh37) based on yrast sequence and assigned configurations.
   955(3/2)-   Dominant configuration=[π(f7/22)#ν(f7/28,p3/24)] 0+~#νp3/21 (2007Zh36).
  1795.6(7/2-)   Dominant configurations of 3p-3h state= πf7/22~#ν(f7/28p3/23p1/21f5/21) and πf7/22~#ν(f7/28p3/24f5/21) (2007Zh36).
Jπ(level): As proposed in 9Be(48Ca,2pγ) (2007Zh37) based on yrast sequence and assigned configurations.
  2145.7(9/2-)   Dominant configuration=πf7/22~# ν[(f7/28p3/24)4+p1/21] (2007Zh36).
Jπ(level): As proposed in 9Be(48Ca,2pγ) (2007Zh37) based on yrast sequence and assigned configurations.
  2805.7(13/2-)   Dominant configuration=πf7/22~# ν[(f7/28p3/24)6+p1/21] (2007Zh36).
Jπ(level): As proposed in 9Be(48Ca,2pγ) (2007Zh37) based on yrast sequence and assigned configurations.
  3580.7(17/2-)   Dominant configuration=πf7/22~# ν[(f7/28p3/24)6+f5/21] (2007Zh36).
Jπ(level): As proposed in 9Be(48Ca,2pγ) (2007Zh37) based on yrast sequence and assigned configurations.
  5461.8(19/2-)   Dominant configuration= πf7/22~#ν(f7/28p3/23p1/21f5/21) (2007Zh36).
Jπ(level): As proposed in 9Be(48Ca,2pγ) (2007Zh37) based on yrast sequence and assigned configurations.

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Additional Gamma Comments:

E(level)E(gamma)Comments
   591.7   591.7E(γ): other: 592.0 5 in 9Be(48Ca,2pγ). From 55Sc β- decay (2003Ma56)
   955   955E(γ): from 9Be(56Ti,55Tiγ) (2009Ma16)
  1795.6  1203.8E(γ): other: 1204.0 5 in 9Be(48Ca,2pγ). From 55Sc β- decay (2003Ma56)
  2145.7   349.6E(γ): other: 351.0 5 in 9Be(48Ca,2pγ). From 55Sc β- decay (2003Ma56)
I(γ): from 55Sc β- decay
  1554.1E(γ): other: 1555.0 5 in 9Be(48Ca,2pγ). From 55Sc β- decay (2003Ma56)
I(γ): from 55Sc β- decay
  2507.9   712.3E(γ): From 55Sc β- decay (2003Ma56)
  2805.7   660.0E(γ): From 9Be(48Ca,2pγ) (2007Zh37)
  3580.7   775.0E(γ): From 9Be(48Ca,2pγ) (2007Zh37)
  5461.8  1881.0E(γ): From 9Be(48Ca,2pγ) (2007Zh37)

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