Conversion of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si55.gif" overflow="scroll"><mml:mn>92</mml:mn><mml:mspace width="0.16em"/><mml:mi>MeV</mml:mi><mml:mo>/</mml:mo><mml:mi>u</mml:mi></mml:math> 38Ca/37K projectile fragments into thermalized ion beams