By Michael D. Lemonick
Within the mid-1990s, astronomers made historical past after they detected 3 planets orbiting stars within the Milky approach. The planets have been not anything like Earth, although: they have been enormous fuel balls like Jupiter or Saturn. greater than 500 planets were came across in view that then, but none of them may aid lifestyles.
Now, armed with extra robust expertise, planet hunters are racing to discover a real dual of Earth. technology author Michael Lemonick has specified entry to those exoplaneteers, as they name themselves, and Mirror Earth unveils their passionate quest. Geoff Marcy, on the collage of California, Berkeley, is the world's so much profitable planet hunter, having discovered of the 1st 3 extra-solar planets. invoice Borucki, on the NASA Ames examine middle, struggled for greater than a decade to release the Kepler mission-the simply planet finder, human or laptop, to overcome Marcy's list. David Charbonneau, at Harvard, discovered that Earths will be a lot more straightforward to discover if he checked out tiny stars referred to as M-dwarfs instead of stars just like the Sun-and that he may use yard telescopes to discover them!
Unlike these in different races, the competing scientists really seek advice and cooperate with each other. yet just one may be the first to discover Earth's dual. Mirror Earth is poised narrate this old occasion because the discovery is made.
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Extra resources for Mirror Earth: The Search for Our Planet's Twin
E. Gregorich and V. gov Abstract: Through many years and many heavy element research projects, Seaborg always brought the authors’ thoughts and discussions back to the superheavy elements (SHE). This guidance led to the construction of the Berkeley Gasfilled Separator (BGS) with its primary program being a search for superheavy elements. In April and May of 1999, the BGS was used to search for the production and decay of element 118 from the 86Kr + 208Pb reaction according to predictions of relatively large production rates.
Our results show an unexpected viability of the cold fusion approach to the synthesis of superheavy nuclei by using projectiles heavier than 70Zn with targets near 208 Pb. , 1996). This relatively large cross section may be explained by the idea of “unshielded fusion” (Swiatecki, 1999) where, with heavier projectiles, the optimal bombarding energy for the 1n deexcitation channel is above the Coulomb barrier so that the Coulomb barrier is no longer the first thing stopping the fusion process. Superheavy Elements at Berkeley 31 ACKNOWLEDGMENTS We gratefully acknowledge the operations staff of the 88-Inch Cyclotron for providing intense, steady beams of 86Kr.
Comparison of the -particle energies observed in this work with the predictions of various mass models for the N – Z = 57 nuclei. We have presented evidence for the first synthesis of new superheavy elements (293118 and its decay products 289116, 285114, 281112, 277110, 273Hs, and 269Sg). The measured -decay energies can be used directly for refinement of nuclear mass and shell models. Our results show an unexpected viability of the cold fusion approach to the synthesis of superheavy nuclei by using projectiles heavier than 70Zn with targets near 208 Pb.
Mirror Earth: The Search for Our Planet's Twin by Michael D. Lemonick