isomer

[paper] Magnetic moment of the 13/2+ isomeric state in 69Cu: Spin alignment in the one-nucleon removal reaction

Magnetic moment of the 13/2+ isomeric state in 69Cu: Spin alignment in the one-nucleon removal reaction

A. Kusoglu et al.

doi: http://dx.doi.org/10.1103/PhysRevC.93.054313

We report on a new measurement of the g factor of the (13/2+) isomeric state in the neutron-rich nucleus 69Cu. This study demonstrates the possibility of obtaining considerable nuclear spin alignment for multi-quasiparticle states in single-nucleon removal reactions. The time-dependent perturbed angular distribution (TDPAD) method was used to extract the gyromagnetic factor of the (13/2+) [T½=351(14) ns] isomeric state of 69Cu. Its g factor was obtained as g(13/2+)=0.248(9). The experimentally observed spin alignment for the state of interest was deduced as A=−3.3(9)%.

May 16, 2016 by experiment 0

[paper] Hyperfine structure anomaly and magnetic moments of neutron deficient Tl isomers with I=9/2

Hyperfine structure anomaly and magnetic moments of neutron deficient Tl isomers with I=9/2

A.E. Barzakh et al.

doi: 10.1103/PhysRevC.86.014311

The hyperfine structure of 276.9-nm atomic transition has been studied by the resonant ionization spectroscopy method at mass-separator IRIS (Investigation of Radioactive Isotopes on Synchrocyclotron), Petersburg Nuclear Physics Institute (PNPI) for the odd Tl isomers with I=9/2 and A=187–197. A differential hyperfine structure anomaly for 6p2P1/2 and 7s2S1/2 atomic states in Tl isomers with I=9/2 has been determined. It is described by the recently developed theoretical approach fairly well. This enables one to recalculate the magnetic moments of 187−193Tlm(I=9/2) from previously measured hyperfine splittings for 7s2S1/2 states and to determine for the first time the magnetic moments for 197Tlm and 195Tlm(I=9/2) from hyperfine splittings for 6p2P1/2 states with properly taking into account the rather great hyperfine structure anomaly. Similar measurements with greater accuracy have been proposed for the other nuclear states in odd-odd Tl isotopes. These measurements could shed light on the nuclear magnetization distribution in these isotopes.

Jul 18, 2012 by experiment g factor 0

[paper] Is the 7/21– Isomer State of 43S Spherical?

Is the 7/21– Isomer State of 43S Spherical?

R. Chevrier et al.

doi: 10.1103/PhysRevLett.108.162501

We report on the spectroscopic quadrupole moment measurement of the 7/21– isomeric state in 4316S27 [E*=320.5(5)  keV, T1/2=415(3)  ns], using the time dependent perturbed angular distribution technique at the RIKEN RIBF facility. Our value, ∣Qs∣=23(3)  efm2, is larger than that expected for a single-particle state. Shell model calculations using the modern SDPF-U interaction for this mass region reproduce remarkably well the measured ∣Qs∣, and show that non-negligible correlations drive the isomeric state away from a purely spherical shape.

Apr 16, 2012 by g factor 0

[paper] Wigner Crystals of 229Th for Optical Excitation of the Nuclear Isomer

Wigner Crystals of 229Th for Optical Excitation of the Nuclear Isomer

C.J. Campbell et al.

doi: 10.1103/PhysRevLett.106.223001

We have produced laser-cooled Wigner crystals of 229Th3+ in a linear Paul trap. The magnetic dipole (A) and electric quadrupole (B) hyperfine constants for four low-lying electronic levels and the relative isotope shifts with respect to 232Th3+ for three low-lying optical transitions are measured. Using the hyperfine B constants in conjunction with prior atomic structure calculations, a new value of the spectroscopic nuclear electric quadrupole moment Q=3.11(16)  eb is deduced. These results are a step towards optical excitation of the low-lying isomer level in the 229Th nucleus.

Jun 30, 2011 by experiment g factor 0

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21Mg 22Mg 23Mg 24Mg 25Mg 26Mg 27Mg 28Mg 29Mg 30Mg 31Al 31Mg 32Mg 33Al 33Mg 40Ar 42Sc 43S 43Sc 44Ar 44Cl 44Sc 45Sc 46Sc 55Ni 57Cu 58Cu 59Cu 61Cu 62Cu 63Cu 64Cu 65Cu 66Cu 67Cu 68Cu 69Cu 70Cu 71Cu 72As 72Cu 72Zn 73Cu 74Cu 74Se 75Cu 76Kr 76Se 77Cu 78Cu 78Kr 78Se 80Kr 80Se 82Kr 82Se 84Kr 84Sr 86Sr 88Kr 88Sr 88Zr 96Ru 100Pd 100Sn 102Ag 104Ag 106Ag 108Ag 110Ag 110Cd 112Sn 114Sn 116Sn 122Sn 124Sn 132Sn 137Ba 140Xe 142Xe 144Nd 146Ba 146Ce 146Nd 148Ce 148Nd 150Nd 154Gd 156Gd 157Er 158Er 168Hf 171Hf 172Hf 187Tl 189Tl 191Tl 193Tl 195Tl 197Tl 229Th 239Pu 250Bk 253Es 254Es 255Fm actinides antiproton arxiv B(E2) b-NMR BCS Be charge radd charge radii chiral effective field theory chiral quark model collinear laser spectroscopy conference paper correlation attenuation Coulex covariant CPT cranker database DSAM electric quadrupole moment electromagnetic moments electron EPJA experiment Gammasphere GANIL g factor Green functions HVTF hydrogen like hyperfine field Hyperfine Interactions hyperfine splitting IBM IBM-2 IBMFM IGISOL in-gas-cell laser spectroscopy island of inversion ISOLDE isomer isotope shift JPhysG KISS laser laser-induced nuclear orientation laser spectroscopy Li LISE LISOL magnetic moment magnetic quadrupole moment mean field MEC moments Monte Carlo N3LO Nilsson-Strutinsky NMR NMR/ON nuclear moments nuclear spin nucleon octupole nuclear magnetic moment PAC PAN paper Paul trap Penning PLB PRC preprint PRL proton QCD QED quadrupole deformation quadrupole moment resonant ionization spectroscopy RIKEN Rutgers Science Science China SDPF-U shell model spin expectation value TDPAD TF theory TIPAD triaxial Λ resonance α-transfer