where eGp
is proportional to kT, and this result is good for temperatures small
compared with the Gamow energy EG.
Tin, Sn
Tin is one of the more interesting materials. It is the element with the largest number of stable isotopes (ten!), because its atomic nuimber, Z=50, is one of the "magic numbers" of nuclear stability. These nuclear magic numbers are 2, 8, 20, 28, 50, 82, 126, ..., which means that Sn-50 and Sn-132 are both "doubly magic" nuclei, have both a magic number of protons and a magic number of neutrons.
Steven Chu
Our Secretary of Energy is a workhorse. As the journal Science states, he works on science "during nights, weekends, and on planes - after putting in 70-80 hours a week as energy secretary." In particular, he's recently published the most precise measurement of gravitational redshift, using "quantum interference of atoms," available here:
http://www.uam.es/personal_pdi/ciencias/jcuevas/Teaching/Muller-Peters-Chu-Nature2010.pdf
Tin, Sn
Tin is one of the more interesting materials. It is the element with the largest number of stable isotopes (ten!), because its atomic nuimber, Z=50, is one of the "magic numbers" of nuclear stability. These nuclear magic numbers are 2, 8, 20, 28, 50, 82, 126, ..., which means that Sn-50 and Sn-132 are both "doubly magic" nuclei, have both a magic number of protons and a magic number of neutrons.
Steven Chu
Our Secretary of Energy is a workhorse. As the journal Science states, he works on science "during nights, weekends, and on planes - after putting in 70-80 hours a week as energy secretary." In particular, he's recently published the most precise measurement of gravitational redshift, using "quantum interference of atoms," available here:
http://www.uam.es/personal_pdi/ciencias/jcuevas/Teaching/Muller-Peters-Chu-Nature2010.pdf