Magnetic moment of the 0.8s 5− isomer 90mZr

doi:10.1016/0375-9474(87)90521-5

Nuclear Physics A

Volume 468, Issue 2, 29 June 1987, Pages 348-356

https://doi.org/10.1016/0375-9474(87)90521-5 Get rights and content

Abstract

The magnetic hyperfine splitting $ν_{M} = ¦ gμ_{N} B_{HF} h ¦$ of ^90mZr (I^π = 5⁻; $T_{12} = 0.8s$ ; E = 2319 keV) in Fe has been measured with the technique of nuclear magnetic resonance on oriented nuclei as 270.6 (1) MHz. With the hyperfine field $B_{HF} (Zr Fe) = −284 (6) kG$ the magnetic moment of ^90mZr is deduced to be $¦μ¦ = 6.25 (13) μN$ . The additivity of magnetic moments and the anomalous orbital g-factor of the proton in ⁹⁰Zr are discussed.

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Nuclear moments and nuclear structure
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Nuclear moments and nuclear structure

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Cited by (14)

Magnetic moments and nuclear structure
2002, Progress in Particle and Nuclear Physics
We review the principal advances and results of magnetic moment measurements for short-lived nuclear states. The latest variants of the technique combine projectile Coulomb excitation in inverse kinematics with intense transient magnetic hyperfine fields. A number of the measurements described were performed in collaboration with the Rutgers University group. Data spanning the range from neon to neodymium nuclei have provided new insights into the nuclear structure of the states in question. The results are discussed in terms of advanced microscopic calculations within the framework of the nuclear shell model. The highly improved experimental accuracy permits critical testing of appropriate configuration spaces of valence nucleons, as well as effective NN interactions derived for these spaces. The applicability of the method to next-generation g-factor measurements on exotic, radioactive projectiles and their eventual theoretical implications is assessed.
First measurements of the g factors of the 2<inf>1</inf>/+ and 3<inf>1</inf>/-states of semi-magic <inf>40</inf>/90Zr
2000, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
The g factors of the 2⁺₁ and 3⁻₁ states in semi-magic ⁹⁰Zr have been measured for the first time with the technique of Coulomb excitation of ⁹⁰Zr beams in inverse kinematics in combination with transient magnetic fields. The resulting g factors, g(2⁺₁)=+1.25(21) and g(3⁻₁)=+0.986(56), are both consistent with a dominant g_9/2 proton configuration and a closed N=50 neutron shell. The lifetime of the 2⁺₁ state was measured by the Doppler shift attenuation method, τ=0.126(3) ps.
Nuclear data sheets for A = 90
1997, Nuclear Data Sheets
Experimental data for all nuclei with mass number A = 90 have been evaluated, and their corresponding level schemes from radioactive decay and reaction studies are presented.
This evaluation shows levels in⁹⁰Tc and⁹⁰Ru from (HI, xpxnγ) reactions seen for the first time, and new levels up to spin J = 25 in⁹⁰Mo. A new precise measurement (93Mi04) of γ rays using the⁸⁹Y(n, γ) reaction provided a complete level scheme for⁹⁰Y, which has superseded that of 83De27.
Cutoff Date:All data received by May 1, 1997 were evaluated.
General Policies and Organization of Material:See the January issue of Nuclear Data Sheets.
Nuclear magnetic moments of 2.0 h 89Nb and 78 h 89Zr
1997, Nuclear Physics A
Nuclear magnetic resonance on oriented nuclei was applied to ⁸⁹Nb ( $I^{π} = 92^{+}$ ; $T_{12} = 2.0 h$ ) and ⁸⁹Zr ( $I^{π} = 92^{+}$ ; $T_{12} = 78 h$ ). The zero-field hyperfine splitting frequency μ_m = | gμ_nB_hf/h |, was determined to be 278.55(12) MHz for ⁸⁹Nb $Fe$ and 51.57(3) MHz for ⁸⁹Zr $Fe$ . With the known magnetic hyperfine fields B_hf(Nb $Fe$ ) = −264.54(19) kG and B_hf(Zr $Fe$ ) = −284(6) kG, the magnetic moments are deduced to be μ(⁸⁹Nb) = 6.216(5) μ_n and μ(⁸⁹Zr) = −1.072(23) μ_n.
Nuclear data sheets for A = 90
1992, Nuclear Data Sheets
Nuclear magnetic moment of 1.6 h N = 51 95Ru
1991, Nuclear Physics, Section A
Nuclear magnetic resonance on oriented nuclei was applied to 1.6 h ⁹⁵Ru after recoil implantation into Fe. The zero-field hyperfine splitting of ⁹⁵Ru $Fe$ was determined to be 128.56(4) MHz. With the hyperfine field of −489.6(4.0) kG the magnetic moment of ⁹⁵Ru is deduced to be |μ| = 0.861 (7)μ_N, which is considerably smaller than the magnetic moment of $N = 51^{91} Zr$ , indicating a large unlike-particle core-polarisation from the $g_{92}$ protons.

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^☆: Work supported by the Bundesministerium für Forschung und Technologie, Bonn, and, partly, by the Kernforschungszentrum, Karlsruhe.

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Nuclear Physics A

Abstract

References (19)

J. Phys. Soc. Jpn.

Z. Phys.

Hyp. Int.

J. of Phys.

Progr. Theor. Phys.

Progr. Theor. Phys. Suppl.

Prog. Theor. Phys.

Nuclear moments and nuclear structure

Nuclear moments and nuclear structure

Cited by (14)

Magnetic moments and nuclear structure

First measurements of the g factors of the 2<inf>1</inf>/<sup>+</sup> and 3<inf>1</inf>/<sup>-</sup>states of semi-magic <inf>40</inf>/<sup>90</sup>Zr

Nuclear data sheets for A = 90

Nuclear magnetic moments of 2.0 h <sup>89</sup>Nb and 78 h <sup>89</sup>Zr

Nuclear data sheets for A = 90

Nuclear magnetic moment of 1.6 h N = 51 <sup>95</sup>Ru

Magnetic moment of the 0.8s 5− isomer 90mZr☆

Abstract

J. Phys. Soc. Jpn.

Z. Phys.

Hyp. Int.

J. of Phys.

Progr. Theor. Phys.

Progr. Theor. Phys. Suppl.

Prog. Theor. Phys.

Nuclear moments and nuclear structure

Nuclear moments and nuclear structure

Magnetic moment of the 0.8s 5⁻ isomer ^90mZr☆