HAL Id: jpa-00219661
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Submitted on 1 Jan 1980
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RECOIL IMPLANTATION MÖSSBAUER
EXPERIMENT ON 57Fe IN Ge IN THE PRESENCE OF AN EXTERNAL MAGNETIC FIELD
G. Langouche, N. Dixon, L. Gettner, S. Hanna
To cite this version:
G. Langouche, N. Dixon, L. Gettner, S. Hanna. RECOIL IMPLANTATION MÖSSBAUER EXPER-
IMENT ON 57Fe IN Ge IN THE PRESENCE OF AN EXTERNAL MAGNETIC FIELD. Journal de
Physique Colloques, 1980, 41 (C1), pp.C1-445-C1-445. �10.1051/jphyscol:19801173�. �jpa-00219661�
JOURNAL DE PHYSIQUE
Colloque Cl , suppl&ment au n " 1 , Tome
41,janvier
1980,page
Cl-445RECOIL IMPLANTATION mSBAUEREXPERIENT ON 5 7 ~ e I N Ge IN M E PRESENCE OF AN m N A L MAGNETIC FIELD
'
G. ~angouche: N.S. Dixon, L. Gettner and SLS. Hanna
Stanford University, Physics Department, Stanford, Ca 94305, USA.
x Leuven University, Physics Department, B-3030 Leuven, BeZgium.
Abstract.- The recoil implantation experiments of Latshaw (1) had an important influence on the later ~Essbauer work on implanted atoms in semiconductors (2,3). It was believed that the observed doublet, with an intensity ratio that changed drastically with temperature, provided strong evidence for a two site hypothesis.
However, it was recently shown for 5 7 ~ e implanted in Si to a dose of 1016atoms/cm2 (4), and for 5 7 ~ e in the decay of 5 7 ~ 0 9 implanted to a dose of 10 14 atoms/cm2 (51, that the doublet is due to a
quadrupole interaction. A dose dependence study (6) and annealing experiments (7) both support the idea that this doublet is associated with 5 7 ~ e in amorphized Si or Ge.
Although it is very tempting to extrapolate these results to the data of Latshaw, one has to be cautious as the experimental conditions are very different : the implantation energy is almost three orders of magnitude higher (20-30 MeV), but the implantation dose (10" atome/cm 2 ) is at least four
orders of magnitude lower. It is hard to make definite statements about amorphisation under these conditions.
Therefore an experiment was set up to perform recoil implantation experiments in an external fie>d.
A 66 beam was used to Coulomb excite the 5 7 ~ e atoms f ~ a m a 2.3 mg/cm2 5 7 ~ e foil, and to recoil implant them into a Ge catcher. This catcher was placed in the gap of a 35 kGauss split coil superconducting magnet, with the field in the beam direction, and the gamma rays were detected perpendicular to this direction.
The resulting Mbsbauer spectrum shows strong evidence for a quadrupole interaction hypothesis.
Differences between the spectra of 5 7 ~ e in Si and Ge will be discussed.
References
/I) Latshaw, G., Ph.D. Thesis, Stanford University, 1971.
/2/ Hafemeister, D.W. and de Waard, Phys. Rev.
g,
3014 (1973)./3/ Weyer, G., Grebe, G., Kettschau, A., Deutsch, B.I., Nylandsted Larsen, A. and Holck, O., J. Physique
21
(1976) C6-893./4/ Sawicka, B.D., Sawicki, J.A., Phys. Lett.
e,
311 (1977)./5/ Langouche, G., Dezsi, I., Van Rossum, M., De bruyn, J., and Coussement, R., Phys. St.at. Sol.
B E , K17 (1978).
/ 6 / Langouche, G., Dezsi, I., De bruyn, J., Van Rossum, M., Coussement, R., Journal de Physique
40, C2-547 (1979).
-
/7/ Langouche, G., de Potter, M., De bruyn, J., Van Rossum, M., Coussement, R., and Dezsi, I., this conference.
+
An extended a r t i c l e has been submitted to Hgperfine Interactions.
Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphyscol:19801173
