Fragment-mass and kinetic-energy distributions from the spontaneous fission of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">No</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>252</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Pre-neutron-emission fragment-mass and total-kinetic-energy distributions and the mass-energy correlations in the spontaneous-fission decay of 2.30-sec ^{252}\mathrm{No}have been deduced from measured energies of coincident fragment pairs using silicon surface-barrier detectors. The ^{252}\mathrm{No}for these measurements was produced in the ^{241}\mathrm{Am}(^{15}\mathrm{N}, 4n)reaction and deposited on 40-\ensuremath{\mu}g...