 Fel rydyn ni'n gwybod, rydym yn gweithio i'r husbysgu'r cwchyddiadau. Dyn ni'n rydyn ni'n gweithio i'r llwyddo ag yr hyn yn y gwahanol, ac yna bod fy môl yn gweithio i'r hawddau ym môl yn gallu fy ffordd. Rydyn ni'n Melony Bailey, ac rydyn ni wedi'i gweithio i'r cyffredinol, ac rydyn ni'n gweithio i'r cyffredinol. Ond rydyn ni'n gweithio i'r cyffredinol, byddwn ni'n gweithio i'r cyffredinol i'r cyffredinol. Ac rwy'n gweld yn dweud y gweld sy'n gwybod i gweithio'r ddau y ffery. Rwy'n gweld unrhyw yng nghymru o'r ffrensau cynallus yng Nghymru. Dyna mae'r CSI yn dweud o'r ymwneud. Rwy'n gweithi'r sgwrs yn dweud o'r ddeudio pwyllfynig o'r gweithio'r gweithio, ac oedd y rhan o'r blaenau yn rhan o. Rwy'n gweithio'r gweithio'r gweithio'r gweithio'r gweithio'r gweithio'r gweithio'r gweithio'r gweithio. Rydyn ni'n ei gwneud o'r morlybiadau a'r medallig, a yna yn rhan i'rryhuneidu gŷtig gyda'r hanes, bydd y rhan i'r pethau a gŷntau. Rydyn ni'n siarad o'r bobl bod yw'r gŷtig o'r bobl, dwi chi'n grannu ychydig hefyd, ond rindd pan hwnny. O'r hanes mae'r tŷach o'i m оно, rydyn ni'n gwneud ei cysyllt yn ymddangos ei bod yn cydwynau. I gynnydd y ffobl dechrau o pertychol o bwysig o'r skeleton o'r heliwm, ac mae'n iawn o bwysig o ddigon o ddegonfod o ddegonfod o gwylltau ac mae'n gweithio'r ffobl i'r ffrindiau. Dw i'r ffrindiau ar y cael y machine, ac byddwyd ond o'r bwysig o'r ffobl i'r ffobl. Ddiwedd y bwysig o'r ffobl yma, roedd o'r ffobl am rhan o dim, A wnaeth wrth y fnerd yn ffordd y odd o amwyaf o yfodol arall, ac mae'n ddadfod y cyfryd yn ei ddefnyddio ynddo i'n fwy fartod. Dyna'r gynhyrchu. Dwi'n rheswm yn myth i gan wneud eu hiriau. Ac mae'n dychydig yn ni'n meddwl i chi'n meddwl? O'n meddwl i chi fod yn cwpia. Yn ymwysgur cwpia. Ond mae'n ddysgrifet ar gyfer. A mae gwneud digwydd Cymru. Mae'n ddarlad. Felly we're already seeing a lot of new elements that haven't been seen before. Yeah, they wouldn't be, yeah. These haven't been seen before, which is really good. What about the gammas? Okay, wow, okay. So this one at 440 here is definitely sodium. We haven't seen sodium in these before. So that's quite surprising actually, isn't it what we expected, is it? It's not what we expected, no. When I'm in the lab and I'm doing an experiment, sometimes I'm the first person in the world to know what's actually happened at that scene of a crime. And that's really fascinating. When the police make an arrest of a suspect, they'll look for gunshot residues using a machine called an electron microscope. Now the problem with the electron microscope is that it's much less sensitive than my technique, the iron beam. And so they can see certain elements, but we can see extra elements that they don't see. The significance of this is that different manufacturers of ammunition powder use different recipes. And so ammunition powder from one source will contain different elements to that of another source. Now with the iron beam, we can pick up differences between these different ammunition powders that you can't see using the police techniques. There's another problem that my technique can solve and this is the problem of contamination. And this can happen when gunshot residue particles are on the police officer that makes the arrest in the first place, or perhaps they can be picked up when the suspect is being transported in the police car. Now using electron microscopy, it can be very difficult to detect contamination because you have very limited information. But using the iron beam, you have much more information about particles and the sources that they've actually come from. I hope that this information can be used to strengthen the value of gunshot residue evidence in the courts. This isn't all I can do with the accelerator, it's not just gunshot residue. I can also look at textile fibres to see how fibres from different types of clothes vary from suspect to suspect. I'm also looking at what I can learn from fingerprints and I've found that we can actually pick up molecules from specific brands of different hair gels and different soaps for example. So what I want you to do is use your index finger and rub it down your nose and then down your left cheek and your right cheek. Rub fingertips together, wonderful. So that just means that we've got all the sweats from their face incorporated with the sweats from their hands as well, which is representative of what somebody would actually have in their sweats if they were going to commit to crime. Something that's really interesting that I'm investigating at the moment is whether we can tell whether somebody's a smoker or a drug user from the chemical composition of their fingerprints. It's fantastic to be able to use physics to help the police to solve crimes that they couldn't previously solve. So looking back physics actually gives me more of a buzz than cake-related crime ever did.