Search for element 113 concluded at last

Sep 26, 2012
Figure one shows the observed decay chain. Credit: RIKEN

The most unambiguous data to date on the elusive 113th atomic element has been obtained by researchers at the RIKEN Nishina Center for Accelerator-based Science (RNC). A chain of six consecutive alpha decays, produced in experiments at the RIKEN Radioisotope Beam Factory (RIBF), conclusively identifies the element through connections to well-known daughter nuclides. The groundbreaking result, reported in the Journal of Physical Society of Japan, sets the stage for Japan to claim naming rights for the element.

The search for is a difficult and painstaking process. Such elements do not occur in nature and must be produced through experiments involving nuclear reactors or , via processes of or neutron absorption. Since the first such element was discovered in 1940, the United States, Russia and Germany have competed to synthesize more of them. Elements 93 to 103 were discovered by the Americans, elements 104 to 106 by the and the Americans, elements 107 to 112 by the Germans, and the two most recently named elements, 114 and 116, by cooperative work of the Russians and Americans.

With their latest findings, associate chief scientist Kosuke Morita and his team at the RNC are set follow in these footsteps and make Japan the first country in Asia to name an atomic element. For many years Morita's team has conducted experiments at the RIKEN Linear Facility in Wako, near Tokyo, in search of the element, using a custom-built gas-filled recoil ion separator (GARIS) coupled to a position-sensitive semiconductor detector to identify reaction products. On August 12, those experiments bore fruit: travelling at 10% the collided with a thin bismuth layer to produce a very heavy ion followed by a chain of six consecutive alpha decays identified as products of an isotope of the 113th element (Figure 1).

Figure two shows the layout of GARIS. Credit: RIKEN

While the team also detected element 113 in experiments conducted in 2004 and 2005, earlier results identified only four decay events followed by the spontaneous fission of dubnium-262 (element 105). In addition to spontaneous fission, the isotope dubnium-262 is known to also decay via alpha decay, but this was not observed, and naming rights were not granted since the final products were not well known nuclides at the time. The decay chain detected in the latest experiments, however, takes the alternative alpha decay route, with data indicating that dubnium decayed into lawrencium-258 (element 103) and finally into mendelevium-254 (element 101). The decay of dubnium-262 to lawrencium-258 is well known and provides unambiguous proof that element 113 is the origin of the chain.

Figure three shows focal plane detectors. Credit: RIKEN

Combined with their earlier experimental results, the team's groundbreaking discovery of the six-step alpha decay chain promises to clinch their claim to naming rights for the 113th element.

"For over 9 years, we have been searching for data conclusively identifying element 113, and now that at last we have it, it feels like a great weight has been lifted from our shoulders," Morita said. "I would like to thank all the researchers and staff involved in this momentous result, who persevered with the belief that one day, 113 would be ours. For our next challenge, we look to the uncharted territory of element 119 and beyond."

Explore further: New model clarifies photoexcited thin-film lattice dynamics

More information: Kosuke Morita et al. "New Result in the Production and Decay of an Isotope, (278)113, of the 113th Element." Journal of Physical Society of Japan, 2012. DOI: 10.1143/JPSJ.81.103201

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User comments : 18

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chardo137
3.9 / 5 (7) Sep 26, 2012
Mr. Morita, I wish you clear sailing on your way to the island of stability.
Mike_Massen
2 / 5 (7) Sep 26, 2012
..it feels like a great weight has been lifted from our shoulders..
Somewhat ironic as its a rather heavy element ;-) But congrats nonetheless, onwards to the island of stability if we can ever find it...

Thanks
kenny1951
not rated yet Sep 26, 2012
Very sound analysis of sufficient data to prove your thesis of finding 113. Any idea of the decay rate ? (1/2 life).
eric96
2 / 5 (4) Sep 26, 2012
Just read this article on Wikipedia (http://en.wikiped...bility), what a lottery for physicists lol. Wow look at the half life numbers. It's truly random such that it seems inevitable that they will find another one with a half life of at least days, maybe even years. Fun physics, what number do you call?
Parsec
5 / 5 (1) Sep 26, 2012
I only wish the island of stability could be reached. Unfortunately, its not difficult to show that any isotope of 116 near or at the island of stability requires very neutron rich isotopes to create it, because this island demands a much more neutron rich isotope of element 116 than we have been able to produce. Neutron rich isotopes of lighter elements are of course difficult in and of themselves to produce and are quite unstable.
Tachyon8491
2.3 / 5 (6) Sep 26, 2012
Now according to evidence supplied by Bob Lazar who worked on retro-engineering of ET-craft, all we need is to synthesise element 115 and we have the fuel for antigravity propulsion...
Argiod
1 / 5 (7) Sep 26, 2012
@Tachyon:
I think that, according to most accounts of ET vehicles; they don't use fuel as such. The exotic element 115 might be some exotic material with properties that would allow it to interface with the aether and tap energy directly from the void. But, of course, the gov't has made it seem as though anything like this is strictly tin-hat material, and you'd have to be crazy to believe it. Of course, they would also like you to believe the universe had a 'beginning', and that the Big Bang theory is the Holy Grail of science. In fact, the Big Bang theory refutes the very foundation of Physics: energy can neither be created nor destroyed, it can only change form (or, state, as they now call it). Also, it challenges the Black Hole theory, in that; if all of what we can currently perceive were in an infinitesimal point in space; then, accoriding to Black Hole theory, there would be so much gravitational pull that nothing, even light, could escape,and light is considered to be massless.
Argiod
1.6 / 5 (7) Sep 26, 2012
Element 115 might also have electro-magnetic properties that would make it perfect for a star drive using, not fuel, but repulsion of some sort... creating a negative ion field around the vehicle, such that it creates its own inertial reference field that isolates it from local Newtonian effects; freeing it from our current understanding of the laws of Physics.
Ober
not rated yet Sep 27, 2012
So why has element 115 not been made? Why the jump from 114 to 116?
Is anyone trying to find 115?
El_Nose
not rated yet Sep 27, 2012
no one caught that Russia is in asia as well as Japan?
Tachyon8491
1.6 / 5 (7) Sep 27, 2012
All evidence appears to point to the fact that element 115 lies smack-bang in the middle of the island of stability - according to Lazar it decays into a particle-antiparticle stream that essentially results in mutual annihilation - the most efficient energy-conversion after fusion and fission. the annihilation energy is transduced in a 100% efficient thermoelectric converter which is then applied to electrogravitic amplifiers which can focus it on an external gravito-inertial reference-frame. There's more to it as these craft clearly display non-inertially-coupled propulsion which effectively results in "mass-cancelling". But of course this is all hallucination according to official sources, despite the many thousands of reports by trained military pilots, radar operators and air-traffic controllers. We'll have to see how that all pans out...
Mike_Massen
2.3 / 5 (9) Sep 27, 2012
Tachyon8491's implicated logic is a bit screwey, needs a lesson in "Science" with
All evidence appears to point to the fact that element 115
What makes you think you can redefine 'evidence' in such a sloppy way ?

Tachyon8491 continued with another level of 'bad thinking' with
..despite the many thousands of reports by trained military pilots, radar operators and air-traffic controllers. We'll have to see how that all pans out...
You realise you connected sightings of lights in the sky with your notion of 'evidence'.

Your phsycis doesnt pan out, the huge number of protons and neutrons need for 115 are from matter - for them to 'somehow' convert to anti-matter suggests conservation of energy is seriously sidestepped but, even if it was correct, just how much mass could be created of any long lasting 115 ?

There have been prior reports of 115 being created, it doesnt last long enough in any isotope yet. Notwithstanding neutron soup, relativistic effects are against us !
Tachyon8491
1.4 / 5 (9) Sep 27, 2012
@Mike M - you have a lot to learn yet Mike - your abject lack of study of the UFO phenomenon is spectacular. Do some serious investigation and look at the Disclosure Project. Only a nail-biting sceptic can still frothingly deny incontrovertible evidence, and the evidence is scientific. Next point - 115 does lie exactly in the centre of the island of stability: examine the facts. How you can call that sloppy rather evidences a conflated type of sloppiness on *your* part. And, I am reporting analysis on the part of the nuclear physicist Bob Lazar (whom you've no doubt ever heard on UTube) - this is not my interpretation. But then again - you, in being superior to Feynman, Hahn, Einstein, Heisenberg, Bohm and others of their ilk, obviously know better. I did not relate the full mechanism of 115 converting into an antimatter stream - too expanded to present here - but do have a look into it if you're not beyond expanding your own neolithic paradigm.
Mike_Massen
2.8 / 5 (11) Sep 27, 2012
@Tachyon8491 :hmm:
So if I understand you correctly, your definition of "Science" is:-

- watching people get up to a microphone claiming to have seen lights in the sky
- watching Lazar make untestable claims on TV re area 51
- trying to guess how matter can be 'messed' around by claimants to provide power *and* propulsion

Surely, you have to ask yourself several questions about this whole process & the widespread 'talk' about things not-identified !

If there are such advanced beings, do you think for one minute they would want humans to reach their level of technical advancements for even a minute and with our history as a species be as fast and loose and immature as shown so far.

Dont think so. However, might I remind you:-

Science = the Disciplined acquisition of knowledge

Sidestepping your tangential insults for the time being just where is the combinatorial and mature discipline of any process in respect of substantiation of your various claims.

Phenomena indeed !
Tachyon8491
1.6 / 5 (7) Sep 27, 2012
@ Mike - if you yourself had not begun with ad hominem accusations this conversation could have been more diplomatic, civilised and productive - but that's not what you chose. With all genuine and heart-felt suggestion, have a look at my extensive article "A Critical look at the UFO phenomenon" on the UFO Casebook at: http://www.ufocas...712.html
Regards,
FV
Ober
3.7 / 5 (3) Sep 27, 2012
It's a shame that physorg posts seem to degrade constantly into personal attacks. Try to keep the debate going without slagging matches.
What I find interesting is that Lazar has been talking about element 115 for some time. It is true that 115 lies in the island of stability. So what do we know about 115 from a pure scientific point of view. Note that I accept Lazars claims as fringe science, as I haven't read any scientific papers to back up his claims. Having said that, I wonder why there isn't much focus on this element? What is special about this element, or why are scientists not paying it much attention?
Mike_Massen
2.3 / 5 (9) Sep 28, 2012
Ah, I see so Tachyon8491 is confirming he is a mere follower & cant answer questions
@ Mike - if you yourself had not begun with ad hominem accusations this conversation could have been more diplomatic, civilised and productive - but that's not what you chose. With all genuine and heart-felt suggestion, have a look at my extensive article "A Critical look at the UFO phenomenon" on the UFO Casebook at: http://www.ufocas...712.html
GUH ! Its not 'critical' a mixture of claims, questions and science fiction graphics. I've seen this sort of stuff for some decades. I recall the 1999 claim by Greer and associates that in 2001 all details will be disclosed - they never were - a waste of time !

Lazar got his fame & money & exposure & self-esteem and ego boost. Everything he claimed is not even close to conservation of energy or dynamics in atomic physics, how is it evidence ?

What is this evidence you claim, substantive ?

Best thing you can do is have a good diet !
Tachyon8491
1.6 / 5 (7) Sep 28, 2012
@Mikey -
I wish you speedy psychospiritual evolution, Mike. You have one heck of a learning curve ahead of you but unfortunately suffer from the typical Ostrich Syndrome - can't see past your engrained scientistic paradigm. Thank you for asserting my "follower status" - we are indeed all followers, seeing as much as our calibre allows. Then again, some of us dare to pursue the limits of perceptual input in the modelling of reality. I assure I have an excellent diet - but I fear you eat what you are, and would rather stay away from that fare...
Kind Regards,
FV

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