Identification of Excited States in 61Ga: Mirror Nuclei in the Upper fp Shell

Andersson, Lise-LotteLund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH (author)

In the fusion-evaporation reaction Ca-40+Mg-24 at 104 MeV beam energy, excited states have been observed for the first time in the isotope Ga-31(61)30. The experimental setup comprised the Ge array CLARION, a recoil mass spectrometer and, in its focal plane, an ionization chamber. Five transitions in Ga-61 are identified, out of which a cascade of three transitions has been established by means of recoil-gammagamma coincidences. The strong transitions at 271 keV in Ga-61 and 124 keV in Zn-61 are viewed as the "mirror" 5/2(-)-->3/2(-) ground-state transitions. The rather large energy difference of 150 keV is suggested to arise from Coulomb monopole contributions. Shell-model calculations support this interpretation.

Johansson, EmmaLund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)nucl-ejo (author)
Ekman, JörgenLund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)kosu-jek (author)
Rudolph, DirkLund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)kosu-dru (author)
du Rietz, RickardLund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)kosu-rdu (author)
Fahlander, ClaesLund University,Lunds universitet,Kärnfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Nuclear physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)kosu-cfa (author)
Gross, CJ (author)
Hausladen, PA (author)
Radford, DC (author)
Hammond, G (author)
KärnfysikFysiska institutionen (creator_code:org_t)

By the author/editor: Andersson, Lise- ...; Johansson, Emma; Ekman, Jörgen; Rudolph, Dirk; du Rietz, Rickar ...; Fahlander, Claes; show more...; Gross, CJ; Hausladen, PA; Radford, DC; Hammond, G; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Subatomic Physic ...

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