mass number

Views Updated: Dec 15, 2025

Abbreviation

Pronunciation

/mæs ˈnəmbər/

Search the site to find in-depth information for the mass number(A) of animals present all over the world.
A radioactive isotope of strontium ( with the mass number(A) 90 ) that is present in the fallout from nuclear explosions; can be assimilated like calcium into bones.
A radioactive isotope of cobalt with mass number(A) 60; a source of exceptionally intense gamma rays; used in radiation therapy.
We have investigated in details the properties of the or Pb and Ni isotopes, and found that the energies and widths of the resonant states decrease with the increasing of the nuclear mass number(A) for the two chains.
Computer make quadrupole mass spectrometer can choose enlarge rate of different ion mass number(A) and different ion flow according to the need of reality, carry on the alternative scanning, thus reach to the request that test effectively and fast to different quality and different sensitivity.

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