7429-92-7 Usage
Uses
Used in Chemical Studies:
Einsteinium is used as a tracer for chemical studies, taking advantage of its high specific alpha activities. This application allows researchers to track and analyze chemical reactions involving einsteinium.
Used in Nuclear Research:
Einsteinium, with its various isotopes and half-lives, can be utilized in nuclear research to study the behavior of radioactive elements and their decay processes. This can contribute to the understanding of nuclear reactions and the development of new technologies in the field of nuclear science.
Used in Educational and Scientific Demonstrations:
Due to its unique properties and historical significance, einsteinium can be used in educational and scientific demonstrations to showcase the properties of man-made radioisotopes and their applications in various fields.
Production
The isotope Es-246 may be synthesized in a cyclotron by bombarding uranium238 with nitrogen ions:
Isotopes of masses 248, 249, 250, 251 and 252 may be prepared from berkelium249 or californium-249 by bombardment with alpha particles or deuterium ions:
Heavier isotopes Es-253, Es-254 and Es-255 can be produced in a nuclear reactor by multiple neutron capture reactions that may occur when uranium, neptunium and plutonium isotopes are irradiated under intense neutron flux. These and other isotopes also are produced during thermonuclear explosions.
Seperation
Einsteinium isotopes are separated on an ion exchange column and eluted with a solution of ammonium citrate. Radioactive isotopes are identified by an activity detector.
History
The name of Es derives from “Albert Einstein”, the Geituan born physicist who proposed the theory of relativity. A collaboration of American scientists G. R. Choppin, S. G. Thompson, A. Ghiorso, and B. G. Harvey, from the Argonne National Laboratory near Chicago, Illinois, the Los Alamos Scientific Laboratory in Los Alamos, New Mexico and at the University of California lab in Berkeley, CA, first found 252Es in the radioactive debris from the first large thermonuclear bomb explosion, nicknamed “Mike,” which took place at Enewetak atoll, Marshall Islands in the Pacific on November 1, 1952. The longest halflife associated with this unstable element is 472 day 252Es.
Check Digit Verification of cas no
The CAS Registry Mumber 7429-92-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,4,2 and 9 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 7429-92:
(6*7)+(5*4)+(4*2)+(3*9)+(2*9)+(1*2)=117
117 % 10 = 7
So 7429-92-7 is a valid CAS Registry Number.
InChI:InChI=1/Es
