yrast state

yrast state

[ē′rast ‚stāt]
(nuclear physics)
An energy state of a nucleus whose energy is less than that of any other state with the same spin.
References in periodicals archive ?
Only the yrast state of positive parity and spin In = [2.
This is due to the difficulty of establishing the deexcitation of a SD band into known yrast states of normal deformed band.