The Quadrupole Interaction of Cd¹¹¹in Cd Metal Measured with the In¹¹¹Decay

Abstract

Recently the quadrupole interaction of Cd in Cd metal was studied by Raghavan and Raghavan (1, 2) with the perturbed angular correlation method.They produced the 49 min isomer in Cdlll by the (n, r ) reaction. In our case the cadmium metal (99.999%) was bombarded in the internal beam of a cyclotron 111by 6 MeV protons for producing I n ' " .In both cases the ground state of the Cd nucleus will be reached over the 84 ns intermediate state (

The Quadrupole Interaction of Cd111 in Polycrystalline Magnesium Measured with PAC

“…From (8) we get q =+0.0046 ea el therefore F ( M g w = +2.56. CE With these assumptions it is possible to calculate F (CdCXJ using F C E ( C d w .…”

“…gives a strong argument, that the negative value is correct. In the temperature K94 physica status solidi (b) 61 range from T = 0 to T = 596 K (meltingpoint of Cd) the interaction frequency 0 (CdCd) decreases by 29% (11,12), while the lattice part of the electric field gradient (CdCdJ decreases by 29% (11,12), while the lattice part of the electric field gradient increases by about 12%. That means that with F the electric to T by more than 70% but in the case of F S CE opinion that a decrease of 70% of the electronic part, caused only by a change of the lattice constants and the thermal vibrational amplitudes (13), is too large.…”

“…2, but with an annealing of the source for10 h at +200 C. The solid line i s a least-squares fit assuming an axially symmetric quadrupole interaction with spin 5/2Comparing the frequencies w in Cd(8) and M g one gets the ratio o (Cd)/w ( M g ) ) = -29.2, according to(1). The difference between these values i s due to lattThe last time a theoretical calculation for the electric field gradient in pure M g was published(9).…”