Collinear laser spectroscopy on108g, 108m In using an ion source with bunched beam release

Eberz, J.; Dinger, Udo; Horiguchi, T.; Huber, G.; Lochmann, H.; Menges, R.; Kirchner, R.; Klepper, O.; Kühl, T.; Marx, D.; Roeckl, E.; Schardt, D.; Ulm, G.

doi:10.1007/bf01294563

Cited by 4 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For 108 In the high spin value 7 is now established, and an unambiguous low spin value of 2 is claimed by a "note added in proof in Ref. 19. In l06 In, a similar configuration is clearly suggested by the spin-7 result, and a low spin value of 2 becomes highly probable, too.…”

Section: Direct Spin Determination Of On-line-separated Isotopes By Nmentioning

confidence: 72%

Direct Spin Determination of On-Line-Separated Isotopes by Nuclear Orientation and Nuclear Magnetic Resonance

Vandeplassche

Wouters

et al. 1986

Phys. Rev. Lett.

View full text Add to dashboard Cite

Nuclear magnetic resonance of on-line-oriented nuclei is reported for the first time, in the cases of mass-separated 106 In, 108 In, and l04 Ag. Combination of the extracted g factors with independent information on the magnetic-moment values leads to unambiguous spin assignment for the high-spin ground states of I06 In and 108 In. The high-precision magnetic moments derived for these nuclei as well as the result on 104 Ag point to strong discrepancies from the additivity relation.PACS numbers: 21.10. Hw, 2U0.Ky, 23.20.En, 27.60.+J Unambiguous spin assignment to ground states of nuclei is a first requirement for reliable nuclear-structure studies. Clearly for these ground-state spin determinations, only "strong arguments" may be used. This means that one should use direct measurements which are independent of decay-scheme considerations. Incomplete and/or erroneous decay schemes have often led to a time dependence of spin assignments based on weak arguments, as, e.g., in the intensively studied cases of 106 In and ""In. 1 " 8 Unfortunately, the choice of methods for ground-state spin determinations which are in accordance with on-line separation conditions is rather limited. The atomicbeam method, which is the ideal method, suffers from low transmission rates, severely restricting its application far from stability. 9 Alternative methods rely on the resolution of the hyperfine structure. This approach may be used, for instance, in laser spectroscopy or in nuclear quadrupole resonance (NQR) spectroscopy. At high spin, though, the hyperfine patterns become highly complicated and overlapping. A clear spin assignment is obtainable when combining laser spectroscopy with rf, but then intensity problems may arise again. This particular technique is being tested for on-line use by at least one group. 10 The principle of NQR has been applied in a quadrupoleinteraction nuclear magnetic resonance on oriented nuclei (NMR-ON) experiment on 188 Ir, n but the method remains restricted to a few favorable cases.A more generally applicable direct method has been developed recently at the nuclear orientation on-line facility KOOL, where nuclear orientation of almost all isotopes produced by the combination of the CYCLONE cyclotron and the LISOL on-line separator can be achieved. 12 The NMR-ON technique, however, was applied up to now only to long-lived isotopes-a review is given by Herzog. 13 The need for high statistics and long search times made this technique to be considered incompatible with on-line working conditions. We succeeded in obtaining NMR-ON curves for ,06 In, 108 In, 104 Ag, and 189 Au m . The last case concerned the study of the high field fraction of implantation sites. 14 An NMR coil was installed around the continuously implanted sample, which was connected to the mixing chamber of a 3 He-4 He dilution refrigerator. The equipment and the acquisition method were developed and tested for on-line use. Special care was taken to eliminate the effects of varying production rates by taking the ratio W(0)/W{n/2) as th...

show abstract

Section: Direct Spin Determination Of On-line-separated Isotopes By Nmentioning

confidence: 72%

Direct Spin Determination of On-Line-Separated Isotopes by Nuclear Orientation and Nuclear Magnetic Resonance

Vandeplassche

Wouters

et al. 1986

Phys. Rev. Lett.

View full text Add to dashboard Cite

show abstract

“…Here we aim to expand the knowledge of the low-lying energy spectrum in 106,108 In using Coulomb excitation for the first time. According to measurements of the magnetic dipole moment in 108 In [3][4][5], the 7 + ground state and the T 1/2 = 39.6 min isomeric 2 + state are dominated by the πg −1 9/2 ⊗ νd 5/2 configuration. The highera e-mail: andreas.ekstrom@nuclear.lu.se lying states have previously been identified in terms of the πg −1 9/2 ⊗νd 5/2 and πg −1 9/2 ⊗νg 7/2 multiplets [5] based on the observed decay pattern following the 108 Cd(p, nγ) 108 In reaction.…”

Section: Introductionmentioning

confidence: 99%

“…According to refs. [3,4,6] the 7 + ground state has a dominating πg −1 9/2 ⊗ νd 5/2 configuration. The first excited state in 106 In is also isomeric with T 1/2 = 5.2 min.…”

Section: Introductionmentioning

confidence: 99%

Coulomb excitation of the odd-odd isotopes 106, 108In

et al. 2010

View full text Add to dashboard Cite

The low-lying states in the odd-odd and unstable isotopes 106,108 In have been Coulomb excited from the ground state and the first excited isomeric state at the REX-ISOLDE facility at CERN. With the additional data provided here the πg −1 9/2 ⊗ νd 5/2 and πg −1 9/2 ⊗ νg 7/2 multiplets have been re-analyzed and are modified compared to previous results. The observed γ-ray de-excitation patterns were interpreted within a shell model calculation based on a realistic effective interaction. The agreement between theory and experiment is satisfactory and the calculations reproduce the observed differences in the excitation pattern of the two isotopes. The calculations exclude a 6 + ground state in 106 In. This is in agreement with the conclusions drawn using other techniques. Furthermore, based on the experimental results, it is also concluded that the ordering of the isomeric and ground state in 108 In is inverted compared to the shell model prediction. Limits on B(E2) values have been extracted where possible. A previously unknown low-lying state at 367 keV in 106 In is also reported.

show abstract

Laserspektroskopie in Molekularstrahlen

Demtröder

2013

Laserspektroskopie 2

View full text Add to dashboard Cite

Collinear laser spectroscopy on108g, 108m In using an ion source with bunched beam release

Cited by 4 publications

References 18 publications

Direct Spin Determination of On-Line-Separated Isotopes by Nuclear Orientation and Nuclear Magnetic Resonance

Direct Spin Determination of On-Line-Separated Isotopes by Nuclear Orientation and Nuclear Magnetic Resonance

Coulomb excitation of the odd-odd isotopes 106, 108In

Laserspektroskopie in Molekularstrahlen

Contact Info

Product

Resources

About