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Submitted on 1 Jan 1969
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TRANSVERSE OPTICAL PUMPING SIGNALS IN 3He
A. Dönszelmann
To cite this version:
A. Dönszelmann. TRANSVERSE OPTICAL PUMPING SIGNALS IN 3He. Journal de Physique Colloques, 1969, 30 (C1), pp.C1-27-C1-27. �10.1051/jphyscol:1969106�. �jpa-00213637�
DETERMINATION OF THE ISOTOPE SHIFT O F ~"CS AND 13ZC~ C 1 - 2 7
is overtaken. All data are preliminary. The fit is insen- sitive to quadratic Zeeman effect. This stems from the fact, that all scanning signals fall into two narrow intervals around 5 000 and 12 000 gauss within which a curvature is not discernible.
From standard formulas [5] the normal nuclear volume effect for Cs is calculated to be 7.5 mK per additional nucleon. The mass effect is expected to be 0.34 mK per nucleon ; but following a calculation of Bauche [6] it is completely cancelled by the coupling effect. The experimental results show, that the volume effect is almost zero. These small values fit into the known series of Cs isotope shifts which reach from lZ7Cs to I3?Cs, [7],
[El.
They do not exceed 2.0 mK per nucleon. This can be interpreted as an increase of the surface difuseness and (or) deformation of the lighter nuclei. This behaviour is expected, when the closed neutron shell of 13'Cs (N = 82) is stripped.We are grateful to Dipl.-Phys. F. Ackermann and Dr. A. Schenck for preparing the resonance vessels.
We appreciate the cooperation of Dr. Schatz in orga- nizing the cyclotron irradiations. We are indebted
to Prof. Seelmann-Eggebert, Dr. Grupe and Dr.
Wassilopoulos who supplied us with the pile produced 13'cs. This work was supported by the Deutsche Forschungsgemeinschaft.
References
[I] ACKERMAN (F.), OTTEN ,(E.-W.), PUTLITZ (G. ZU), SCHENCK (A.) and ULLRICH (S.), Phys. Letters, 1968, 26 B , 367.
[2] SAGALYN (P. L.), MELISSINOS (A. C.), and BmeR (F.), Phys. Rev., 1958, 109, 375.
[3] YELLIN (I.), MARRUS (R.), WANG (E.), BuU. Amer.
Phys. Soc., 1967, Series 11 Volume 12, 905.
[4] Atomic Energy Levels NBS. 467.
[5] KOPFERMANN (H.), Kernmornente, Akadernische Ver- lagsgesellschaft, Frankfurt, 1956.
[6] BAUCHE (J.), Lab. Aime Cotton, Orsay, unpublished.
[7] 1271 129Cs : MARRUS (R.), Orsay/Berkeley, priv.
communication.
[8] 13Sp 137C~ : H ~ ~ H N E R M A N N (H.), P h y ~ . Letters 1966,
21, 303.
[9] HUHNERMANN (H.) and WAGNER (H.)?Z. Physik, 1968, 215, Heft 1 (Abstracts).
TRANSVERSE OPTICAL PUMPING SIGNALS IN 3He
A. DONSZELMANN Laboratoire Zeeman, Amsterdam
RCsum6. - Le travail qui a Cte expos6 est une gCnCralisation de ceux qui ont it6 decrits par [I], [2] pour le cas de 3He. Les experiences sont en train de se rkaliser et les rCsultats seront publies dans Physica.
Abstract. - The work which is discussed is a generalisation of that described in [I], [2] in the case of 3He. The experiments are not finished and the results will appear in Physica.
Bibliographic Paris, 1966, 262, 37 ; C. R. Acad. Sci., Paris 1966, 262, 286.
[l] COHEN-TANNOUDJI (C.) et HAROCHE (S.), C. R. Acad. [2] PARTRIDGE (R. B.) et SEMES (G. W.), Proc. Phys. Soc., Sci., Paris, 1965, 261, 5400 ; C. R. Acarl. Sci., 1966, 88, 983.
Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphyscol:1969106
