Heavy isotopes heaviest isotopes heavy isotope. Medical search. Frequent questions

The part that scientists didn't understand until about 100 years ago is that certain elements have isotopes that are radioactive. (howstuffworks.com)
In some elements, all of the isotopes are radioactive. (howstuffworks.com)

The challenge is to create such isotopes by bombarding target nuclei rich in protons and neutrons with a beam of projectiles having the right number of protons, and also rich in neutrons, to yield a compound nucleus with the desired properties. (lbl.gov)
Atoms of both isotopes of copper have 29 protons, but a copper-63 atom has 34 neutrons while a copper-65 atom has 36 neutrons. (howstuffworks.com)
[a] One of its isotopes, 270 Hs, has magic numbers of both protons and neutrons for deformed nuclei, which gives it greater stability against spontaneous fission . (wikipedia.org)

it has been produced in a laboratory only in very small quantities by fusing heavy nuclei with lighter ones. (wikipedia.org)
This decreased the number of neutron ejections during synthesis, creating heavier, more stable resulting nuclei. (wikipedia.org)
[22] The material made of the heavier nuclei is made into a target, which is then bombarded by the beam of lighter nuclei. (wikipedia.org)

Starting with the creation of a new isotope of the yet-to-be-named element 114, the researchers observed successive emissions of alpha particles that yielded new isotopes of copernicium (element 112), darmstadtium (element 110), hassium (element 108), seaborgium (element 106), and rutherfordium (element 104). (lbl.gov)
Chemistry experiments have confirmed that hassium behaves as the heavier homologue to osmium , reacting readily with oxygen to form a volatile tetroxide . (wikipedia.org)

Both isotopes act and look the same, and both are stable. (howstuffworks.com)
its most stable known isotopes have half-lives of approximately ten seconds. (wikipedia.org)

However, it was suggested that a so-called specific difference between the hyperfine splittings in hydrogen-like and lithium-like ions of the same isotope can be used to cancel nuclear structure effects and provide an accurate test of QED [Shabaev et al. (fnal.gov)
Information gained from the new isotopes will contribute to a better understanding of the theory of nuclear shell structure, which underlies predictions of an "Island of Stability," a group of long-lasting isotopes thought to exist amidst a sea of much shorter-lived, intrinsically unstable isotopes of the superheavy elements. (lbl.gov)
The group that found the new isotopes is led by Heino Nitsche, head of the Heavy Element Nuclear and Radiochemistry Group in Berkeley Lab's Nuclear Science Division (NSD) and professor of chemistry at the University of California at Berkeley. (lbl.gov)

The discovery of six new isotopes, reaching in an unbroken chain of decays from element 114 down to rutherfordium, is a major step toward better understanding how to explore the region of enhanced stability thought to lie in the vicinity of element 114-and possibly beyond. (lbl.gov)

A team of scientists at the U.S. Department of Energy's Lawrence Berkeley National Laboratory has detected six isotopes, never seen before, of the superheavy elements 104 through 114. (lbl.gov)
Elements heavier than 114 have been seen but none have been independently confirmed. (lbl.gov)
The possibility of finding "magic" or "doubly magic" isotopes of superheavy elements (with both proton and neutron outer shells completely filled) led to predictions of a region of enhanced stability in the 1960s. (lbl.gov)
This section is transcluded from Introduction to the heaviest elements . (wikipedia.org)

Ellison says, "There's only a very low probability that the two isotopes will interact to form a compound nucleus. (lbl.gov)

Ken Gregorich, a senior staff scientist in NSD, is responsible for the group's day-to-day research operation at the 88-inch Cyclotron and the Berkeley Gas-filled Separator, the instrument used to isolate and identify the new isotopes. (lbl.gov)
The 20-member team included scientists from Berkeley Lab, UC Berkeley, Lawrence Livermore National Laboratory, Germany's GSI Helmholtz Center for Heavy Ion Research, Oregon State University, and Norway's Institute for Energy Technology. (lbl.gov)

The possibility of testing quantum electrodynamics (QED) in very strong fields by laser spectroscopy on heavy highly charged ions has been opened by the first observation of the hyperfine splitting in hydrogen-like bismuth in 1994 [Klaft et al. (fnal.gov)