A metastable ion peak is a broad peak which appears at non-integral values of m/e in a mass spectrum. It is formed by a fragment ion. An unstable molecule such as an alcohol c…an undergo fragmentation during ionization ( collision with high energy electrons in ionization chamber of the mass spectrometer ) to give rise to a fragment ion. This fragment ion is also called the metastable ion. (MORE)
While surgery of metastatic cancer may not increase life, there may be indications for it such as pain relief, obstruction removal, control of bleeding, and resolution of infe…ction. (MORE)
Excited state of an atom, nucleus, or other system that has a longer lifetime than the ordinary excited states and generally has a shorter lifetime than the ground state. It c…an be considered a temporary energy trap or a somewhat stable intermediate stage of a system of which the energy may be lost in discrete amounts. The many photochemical reactions of mercury are a result of the metastable state of mercury atoms, and radiation from metastable oxygen atoms accounts for the characteristic green colour of the aurora borealis and aurora australis. (MORE)
The role of metastable states in circumventing laser pulse jitters in multi-step laser excitation of high-lying Rydberg and autoionizing states is discussed. A case study is p…resented where step-wise excitation of 3d4d (3)G(3,4,5) states of Ca is achieved despite a large jitter between the laser pulses (MORE)
Dynamic Metastable Equilibrium as it relates to Geomorphologydescribes a system threshold that changes dramatically throughtime, in an otherwise steady system. In other words,… it is acombination of dynamic equilibrium and metastable equlibrium. Anexample would be changing sea level as it respositions shorelinesthese changes typically ocurr over thousands of years. (MORE)