alejandro.rivero
Jun7-04, 04:54 AM
<jabberwocky><div class="vbmenu_control"><a href="jabberwocky:;" onClick="newWindow=window.open('','usenetCode','toolbar=no, location=no,scrollbars=yes,resizable=yes,status=no ,width=650,height=400'); newWindow.document.write('<HTML><HEAD><TITLE>Usenet ASCII</TITLE></HEAD><BODY topmargin=0 leftmargin=0 BGCOLOR=#F1F1F1><table border=0 width=625><td bgcolor=midnightblue><font color=#F1F1F1>This Usenet message\'s original ASCII form: </font></td></tr><tr><td width=449><br><br><font face=courier><UL><PRE>\nHello,\n\nI noticed that when one plots the beta+ decay half-lifes (as available\nin nudat, for instance) two very very different patterns appear,\ndepending if Z>N or not.\n\nIt is the first time I see such thing; I had never plotter beta+; and\nbeta- does not cover the Z=N line. Has anybody seen this phenomena\ncommented in textbooks? My first impulse is to blame the Pauli Term in\nWeizsaecker formula; it becomes zero, and then the electromagnetic\nterm dominates. But when I plot halflifes as a funcion of A, i am\nunsure about how to relate the empirical dependence with this\ntheoretical term.\n</UL></PRE></font></td></tr></table></BODY><HTML>');"> <IMG SRC=/images/buttons/ip.gif BORDER=0 ALIGN=CENTER ALT="View this Usenet post in original ASCII form"> View this Usenet post in original ASCII form </a></div><P></jabberwocky>Hello,
I noticed that when one plots the \beta+ decay half-lifes (as available
in nudat, for instance) two very very different patterns appear,
depending if Z>N or not.
It is the first time I see such thing; I had never plotter \beta+; and
\beta- does not cover the Z=N line. Has anybody seen this phenomena
commented in textbooks? My first impulse is to blame the Pauli Term in
Weizsaecker formula; it becomes zero, and then the electromagnetic
term dominates. But when I plot halflifes as a funcion of A, i am
unsure about how to relate the empirical dependence with this
theoretical term.
I noticed that when one plots the \beta+ decay half-lifes (as available
in nudat, for instance) two very very different patterns appear,
depending if Z>N or not.
It is the first time I see such thing; I had never plotter \beta+; and
\beta- does not cover the Z=N line. Has anybody seen this phenomena
commented in textbooks? My first impulse is to blame the Pauli Term in
Weizsaecker formula; it becomes zero, and then the electromagnetic
term dominates. But when I plot halflifes as a funcion of A, i am
unsure about how to relate the empirical dependence with this
theoretical term.