PHYSICAL REVIEW C
                                           NUCLEAR PHYSICS
 
                                                Editor
                                            SAM M. AUSTIN
                             
                                           Associate Editors
                              BENJAMIN F. GIBSON       ROBERT L. McGRATH

                                        Senior Assistant Editor
                                        CHRISTOPHER WESSELBORG

                                    Senior Assistant to the Editor
                                            DEBBIE BRODBAR

                              
                                           Editorial Board

Term ending 31 December 1997        Term ending 31 December 1998       Term ending 31 December 1999

       JOHN C. HARDY                         ROY J. HOLT                    A. BAHA BALANTEKIN
     WALTER F. HENNING                      TENG LEK KHOO                       AVRAHAM GAL
       NATHAN ISGUR                       D. JOHN MILLENER                 GOTTFRIED MUNZENBERG
    JOSEPH I. KAPUSTA                      WERNER SANDHAS                    MICHAEL WIESCHER


    Published through the	Manuscripts for publication should be submitted to the Editorial 
American Institute of Physics   Office in triplicate.  Information for contributors may be found 
            by			in the January and July issues.  Submission is a representation 
The American Physical Society	that the manuscript has not been published previously and is not      
         _________    		currently under consideration for publication elsewhere.  A signed 
          			APS copyright-transfer form (to take effect upon publication)
         President		must be provided, and should be included with the submission.  The
     D. ALLAN BROMLEY		copyright-transfer form appears at the end of the 18 November 1996
				issue of Physical Review Letters and is available from the Editorial 
      President-Elect		Office (or via ftp to aps.org).
     ANDREW M. SESSLER		To support wide dissemination of research results through publication, 
      				the authors' institutions are requested to pay a publication charge 
      Vice-President	        of $70 per page plus a $70 abstract charge.  For properly prepared  
    JEROME I. FRIEDMAN		electronic submissions, no payment of charges is requested. Acceptable 
				formats are REVTeX (preferred), LaTeX, Harvmac, plain Tex. Reprints are 
     Executive Officer   	offered for sale to authors.	
       JUDY R. FRANZ		Inquiries regarding subscriptions, renewals, address changes,
				missing or damaged copies, microfilm and single-copy orders should
        Treasurer	        be addressed as follows:
   THOMAS J. MCILRATH		Members: APS Membership Department, One Physics Ellipse, College
				Park, MD 20740-3844.[phone:(301)209-3280; fax:(301)209-0867; e-mail:
     Editor-in-Chief            membership@aps.org].
       MARTIN BLUME		Nonmembers:  Circulation and Fulfillment Division, American Intitute
	_________		of Physics, 500 Sunnyside Blvd., Woodbury, NY 11797 [phone:(516)576-2270,          
                                (800)344-6902; fax:(516)349-9704; e-mail: subs@aip.org]. Allow at least			
    				six-weeks advance notice.  For address changes please send both old
    Editorial Office:		and new addresses, and, if possible, include an address stencil imprint
				from the mailing wrapper of a recent issue.  A change-of-address  
			        form is included in every issue of Physics Today. 
1 Research Road
Box 9000	                The Annual Index of Physical Review and Physical Review Letters may 
Ridge, NY 11961-9000            be ordered.  Back issues are available.  There are mail surcharges
Telephone:(516)591-4030		for non-U.S. destinations.  An online version of the journal is available.
Fax:* (516)591-4141      	See our Web server for information, or inquire at assocpub@aps.org.
Internet:* prc@aps.org     	Physical Review C (ISSN:0556-2813) is published once a month
World Wide Web server:		(on the 1st of each month) by The American Physical Society through
  http://publish.aps.org/	the American Institute of Physics.  Periodicals postage rates are
				paid at Woodbury, NY, and additional mailing offices.  POSTMASTER: 
				Send address changes to Physical Review C, APS Membership Department,
				One Physics Ellipse, College Park, MD 20740-3844.

				


*Not for transmission of               Copyright 1997 by The American Physical Society
manuscripts

	 			Permission to quote excerpts or to reprint any figures or tables
 		 		should be obtained directly from an author.  The American Physical 
	 			Society for its part hereby grants permission to quote excerpts and 
				reprint up to 25 figures and/or tables from its journals with
 			        acknowledgment of the sources.  Requests for permission to reprint in 
				one publication more than 25 figures and/or tables from the totality 
				of APS journals must be made in writing to the Associate Publisher 
				(see address below).  A $10.00 fee per figure and/or table in excess 
				of 25 will be charged.
				
				Individual teachers, students, researchers, and libraries in non-
				profit institutions acting for them are permitted to make hard copies
				of articles for use in teaching or research, provided such copies 			
             			are not sold.

				Copying of articles for sale by document delivery services or
				suppliers, or beyond the free copying allowed above, is permitted
				against payment of a copying fee.  The current copying fee is $10.00,
				per article, per copy.  Express permission of APS is not required,
For electronic submission	except for purposes stated below, provided that the fee is paid
of manuscripts use		through the Copyright Clearance Center, Inc. (CCC), 222 Rosewood
prctex@aps.org			Drive, Danvers, MA 01923.  Contact the CCC for information on how
				to report copying and remit payments.
Production and distribution by
American Institute of Physics	Reproduction in a reprint collection, or for advertising or
500 Sunnyside Blvd.		promotion purposes, or republication in any form requires
Woodbury, NY 11797		permission of one of the authors and a license from APS.
Telephone:(516)576-2200		Such a license must be sought from Mina Chung, Associate Publisher, 
Fax:(516)349-1802		The American Physical Society, One Physics Ellipse, College
Internet: prc@aip.org    	Park, MD 20740-3844.  Permission from the author must be sought
 		                and obtained from him or her directly.
World Wide Web server:
  http://www.aip.org/				

CODEN: PRVCAN
PRINTED IN USA