E. Recknagel

Magnetic moment of the isomeric 92+ state in 67Zn

Abstract The isomeric 605 keV, 9 2 + state in 67 Zn was populated by means of the nuclear reaction 64 Ni(α, n). The half-life was remeasured to be T 1 2 = 333(14) ns and the magnetic moment was determined with the pulsed beam PAD method as μ = − 1.094(9) n.m. These results are compared with half-lives and moments of corresponding 9 2 + neutron states in 67, 69, 71, 73 Ge.

The g-factors of the first excited states in 78Br and 80Br

Abstract Low-lying states of the doubly odd Br isotopes were populated by means of the nuclear reactions 78, 80, 82Se(p, n)78, 80, 82Br. The g-factors of the first excited 2− states in 78Br and 80Br were measured with the pulsed beam DPAD method and were found to be g( 78 Br ) = − 0.56 ± 0.02 and g( 80 Br ) = − 0.83 ± 0.06 .

Magnetic moment and half-life of the isomeric 112− state in 107Cd

Abstract An isomeric level in 107Cd at 845 keV populated by the reactions 107Ag(p, n), 106Cd(d, p) and 104Pd(α, n) has been observed. The half-life of this state is T 1 2 = 77(7) ns , and the spin and parity are I π = 11 2 − . The magnetic moment has been determined by the pulsed beam time-differential perturbed angular distribution method (DPAD) to be μ = −1.012(12) n.m.

The g-factors of short-lived isomeric states in 108Ag and 110Ag

Abstract Short-lived isomeric states in 108Ag and 110Ag were populated by means of (p, n) and (d, p) reactions. The nuclear g-factors of these states were determined with the pulsed beam DPAD method to be g( 108 Ag ; 215 keV ) = 1.294(6) and g( 110 Ag ; 119 keV ) = 1.277(15) . The results indicate a spin and parity Iπ = 2+ for 108Ag and Iπ = 3+ for 110Ag.

Low-lying levels and the magnetic moment of the 3+ 213.5 keV state in 72As

Abstract Low-lying levels of 72 As have been studied by excitation function, γγ concidenec, and neutron time-of-flight measurements using the reaction 72 Ge (p, n). A new isomeric state at 213.5keV was found. The spin-parity and half-life of this level were determined to be I π = 3 + and T 1 2 = 80(2) ns , respectively. The g-factor has been measured by the pulsed beam time-differential perturbed angular distribution method (DPAD) and found to be g= +0.527(6).

Magnetic hyperfine field for arsenic in nickel

The magnetic hyperfine field for As in nickel has been remeasured by DPAD techniques. Using a sandwich type of target the excited As nuclei were recoil-implanted into unpolarized nickel layers after the reaction71Ga (α, n)74As. The resultHhf (300 K)=106 (2) kOe differs considerably from a former IPAC measurement.

Magnetic moment of the 2− state in 92Nb

Abstract The g-factor of the [π(2 p 1 2 ) 1 v(2 d 5 2 ) 1 ] 2 − state in92Nb(τ = 6.2 μsec) was determined by means of perturbed angular distribution methods using the 92Zr(p, n)92Nb reaction in a liquid alloy. The extracted v( d 5 2 ) magnetic moment is discussed in terms of the core-polarization effect.

Das magnetische hyperfeinfeld von Zn in Eisen gemessen mit der DPAD-Methode

Zusammenfassung Das innere Feld von Zn in Eisen wurde mit der DPAD-Methode (Time Differential Perturbed Angular Distribution) gemessen. Dazu wurde 67mZn (T 1 2 = 333 ns ) mit Hilfe des Ruckstosses nach der Reaktion 64Ni(α, n) ins ferromagnetische Gitter implantiert und die Larmor-Prazession des Kernspins (I π = 9 2 + , g =-0.243) im effektiven Magnetfeld beobachtet. Die experimentelle Methode und das Ergebnis, Hhf(T = 0 K) = -191(3) kG, werden diskutiert.