Hyperfine structure and isotope shift measurements in neutral gallium and indium with a pulsed dye laser

Neijzen, Jaap H. M.; Dönszelmann, A.

doi:10.1016/0378-4363(80)90083-2

Cited by 25 publications

(22 citation statements)

References 12 publications

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“…Isotope shift values measured in this work on the neutron-deficient Ga isotopes and those measured during previous experiments on the neutron rich isotopes [2][3][4][5] are all presented in Table VI. Prior to this work only δν 71,69 IS = +39.6(3.5) MHz had been measured [32] and is in excellent agreement with our value in Table VI. In order to extract mean-square charge radii values from isotope shifts two atomic factors need to be evaluated for the transition under study: the atomic mass-shift factor, K MS , and field-shift factor, F el .…”

Section: Isotope Shiftssupporting

confidence: 89%

Nuclear mean-square charge radii of63,64,66,68−82Ga nuclei: No anomalous behavior atN=32
Procter¹,
Billowes²,
Bissell³
et al. 2012
Phys. Rev. C
30
1
21
0
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Collinear laser spectroscopy was performed on the 63,64,66,68−82 Ga isotopes with neutron numbers from N = 32 to N = 51. These measurements were carried out at the ISOLDE radioactive ion beam facility at CERN. Here we present the nuclear mean-square charge radii extracted from the isotope shifts and, for the lighter isotopes, new spin and moment values. New ground-state nuclear spin and moments were extracted from the hyperfine spectra of 63,70 Ga, measured on an atomic transition in the neutral atom. The ground-state spin of 63 Ga is determined to be I = 3/2. Analysis of the trend in the change in mean-square charge radii of the gallium isotopes demonstrates that there is no evidence of anomalous charge radii behavior in gallium in the region of N = 32.

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Section: Isotope Shiftssupporting

confidence: 89%

Nuclear mean-square charge radii of63,64,66,68−82Ga nuclei: No anomalous behavior atN=32
Procter¹,
Billowes²,
Bissell³
et al. 2012
Phys. Rev. C
30
1
21
0
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“…Those of 67;69;71 Ga are consistent with the previous measurements [25][26][27]. The A-factor ratio for 79 Ga (assuming I ¼ 5=2) is 5.73(4) ( Table II), which deviates more than 3 from the weighted mean of all isotopes.…”

supporting

confidence: 90%

Nuclear Spins and Moments of Ga Isotopes Reveal Sudden Structural Changes betweenN=40andN=50

et al. 2010

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Collinear laser spectroscopy was performed on Ga (Z ¼ 31) isotopes at ISOLDE, CERN. A gas-filled linear Paul trap (ISCOOL) was used to extend measurements towards very neutron-rich isotopes (N ¼ 36-50 Nuclear structure has for some time been described by the single-particle (SP) states of nucleons in the shell model. The evolution and reordering of these levels along isotopic chains is explored at radioactive ion beam facilities to provide information on the nature of the nucleonnucleon interaction. Key to these studies is the determination of the value of the nuclear spin of each state, which provides a means of level identification. Whereas the spin may sometimes be inferred from nuclear decay and -spectroscopy data, laser spectroscopy [1,2] permits a measurement of the nuclear spin, in addition to the state's magnetic dipole and electric quadrupole moments. The latter two observables are very sensitive to the wave function and thus to the SP shell evolution. The sensitivity of the laser technique has been critically enhanced using bunched beams from a gas-filled linear rf quadrupole known as an ion beam cooler [3]. In this Letter we report the application of ISCOOL [4]-an ion beam cooler recently installed at ISOLDE-for collinear laser spectroscopy on Ga isotopes from stable to the magic N ¼ 50 shell gap, located 15 isotopes away from stability. For the first time g.s. spins have been measured, revealing sudden changes not observed in earlier experiments.The Ga isotopes have three protons outside the Z ¼ 28 shell gap. In a normal shell-model ordering, the three protons would occupy the p 3=2 level, leading to a g.s. spin I ¼ 3=2 for all odd-A Ga isotopes. However, in the Cu isotones with two protons fewer, it has been demonstrated that the proton SP ordering changes when neutrons start occupying the g 9=2 orbital around N ¼ 40 [5][6][7][8][9][10][11][12][13][14][15]. An inversion of the p 3=2 and f 5=2 SP levels was established recently in 75 Cu at N ¼ 46 [11], where the 5=2 À g.s. is near degenerate with a 3=2 À and 1=2 À state [11]. In this Letter we establish the g.s. spins and structure of the odd-A Ga isotopes from N ¼ 36 up to the N ¼ 50 shell closure, and we investigate the systematics of the 1=2 À , 3=2 À and 5=2 À levels.Fission fragments were produced in a thick UC x target (45 g=cm 2 ) using 1.4 GeV protons at an average current of $2 A. A proton-neutron converter [16] was used to suppress the Rb production. The Ga yield was selectively enhanced by a factor of 100 using the Resonant Ionization Laser-Ion Source [17], extracted and accelerated to 30 keV and mass selected. The ions were cooled and bunched by the newly-installed ISCOOL [4] and delivered to the collinear laser spectroscopy setup [18]. The ion beam was

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“…Hyperfine structure of the 5s 2 5p j states of In 115 and In 113 were measured by the magnetic-resonance method [13,14]. An atomic beam irradiated by a narrow band dye laser was used in [15] to observe resonance fluorescence in free indium atom. From the resonance frequencies, values for the hyperfine structure of the 5s 2 6s level in In 115 and In 113 were derived by Neijzen and Dönszelmann in [15].…”

Section: Introductionmentioning

confidence: 99%

“…An atomic beam irradiated by a narrow band dye laser was used in [15] to observe resonance fluorescence in free indium atom. From the resonance frequencies, values for the hyperfine structure of the 5s 2 6s level in In 115 and In 113 were derived by Neijzen and Dönszelmann in [15]. The spin-forbidden 5s 2 5p 2 P -5s5p 2 4 P In 115 transition was analyzed and absolute wavelengths, hyperfine constants A and B, as well as improved energy level values were reported by Karlsson and Litzén in [16].…”

Section: Introductionmentioning

confidence: 99%

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Relativistic all-order calculations ofInIandSnIIatomic properties

Safronova

Kozlov

2007

Phys. Rev. A

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We use all-order relativistic many-body perturbation theory to study 5s 2 nl configurations of In I and Sn II. Energies, E1-amplitudes, and hyperfine constants are calculated using all-order method, which accounts for single and double excitations of the Dirac-Fock wave functions. A comprehensive review of experimental and theoretical studies of In I and Sn II properties is given. Our results are compared with other studies were available.

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Hyperfine structure and isotope shift measurements in neutral gallium and indium with a pulsed dye laser

Cited by 25 publications

References 12 publications

Nuclear mean-square charge radii of63,64,66,68−82Ga nuclei: No anomalous behavior atN=32
Procter¹,
Billowes²,
Bissell³
et al. 2012
Phys. Rev. C
30
1
21
0
View full text Add to dashboard Cite

Nuclear mean-square charge radii of63,64,66,68−82Ga nuclei: No anomalous behavior atN=32
Procter¹,
Billowes²,
Bissell³
et al. 2012
Phys. Rev. C
30
1
21
0
View full text Add to dashboard Cite

Nuclear Spins and Moments of Ga Isotopes Reveal Sudden Structural Changes betweenN=40andN=50

Relativistic all-order calculations ofInIandSnIIatomic properties

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Hyperfine structure and isotope shift measurements in neutral gallium and indium with a pulsed dye laser

Cited by 25 publications

References 12 publications

Nuclear mean-square charge radii of63,64,66,68−82Ga nuclei: No anomalous behavior atN=32Procter1, Billowes2, Bissell3 et al. 2012Phys. Rev. C301210View full textAdd to dashboardCite

Nuclear mean-square charge radii of63,64,66,68−82Ga nuclei: No anomalous behavior atN=32Procter1, Billowes2, Bissell3 et al. 2012Phys. Rev. C301210View full textAdd to dashboardCite

Nuclear Spins and Moments of Ga Isotopes Reveal Sudden Structural Changes betweenN=40andN=50

Relativistic all-order calculations ofInIandSnIIatomic properties

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Product

Resources

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Nuclear mean-square charge radii of63,64,66,68−82Ga nuclei: No anomalous behavior atN=32
Procter¹,
Billowes²,
Bissell³
et al. 2012
Phys. Rev. C
30
1
21
0
View full text Add to dashboard Cite

Nuclear mean-square charge radii of63,64,66,68−82Ga nuclei: No anomalous behavior atN=32
Procter¹,
Billowes²,
Bissell³
et al. 2012
Phys. Rev. C
30
1
21
0
View full text Add to dashboard Cite